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1.


    Makarova, I. P.
    Structure and twinning of RbLiCrO4 crystals / I. P. Makarova, I. A. Verin, K. S. Aleksandrov // Acta Crystallogr. B. - 1993. - Vol. 49. - P. 19-28, DOI 10.1107/S0108768192006141. - Cited References: 14 . - ISSN 0108-7681
РУБ Crystallography
Рубрики:
LITHIUM POTASSIUM-SULFATE
   NEUTRON-DIFFRACTION

   THERMAL VIBRATIONS

   KLISO4

   PROGRAM

   LIKSO4

Аннотация: The crystal structures of the G3 (space group P31c) and G2 (space group P6(3)) phases of RbLiCrO4 have been determined from X-ray diffraction data (Mo Kalpha radiation) at 293, 428, 493 and 523 K (G3 phase) and 553 and 583 K (G2 phase). The RbLiCrO4 crystals exhibit twinning by merohedry with twin laws in the G3 phase: 2 parallel-to [001], m perpendicular-to [001], 1BAR; in the G2 phase: m parallel-to [001], 2 perpendicular-to [001], 1BAR. The analysis of diffraction intensities and influence of anomalous scattering on them provided the unambiguous determination of the twin laws for all the specimens investigated. The structure has been refined using the approximation of the anharmonic thermal vibrations of atoms.

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Держатели документа:
ACAD SCI,INST PHYS,SIBERIAN DIV,KRASNOYARSK 660036,RUSSIA
ИФ СО РАН

Доп.точки доступа:
Verin, I. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич
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2.


    Makarova, I. P.
    X-ray diffraction study of RbLiCrO4 / I. P. Makarova, I. A. Verin, K. S. Aleksandrov // Ferroelectrics. - 1991. - Vol. 124, Is. 1. - P. 91-96, DOI 10.1080/00150199108209420. - Cited References: 12 . - ISSN 0015-0193
РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
LITHIUM POTASSIUM-SULFATE
   THERMAL VIBRATIONS

   CRYSTALS

   PROGRAM

   KLISO4

   LIKSO4

Аннотация: Crystal structure of RbLiCrO4 was determined in G3 phase (sp. gr. P31c) at 293, 428, 493, 523 K and in G2 phase (sp. gr. P63) at 553, 583 K applying X-ray diffraction data. The investigated crystals exhibit ‘twinning by merohedry’. The analysis of intensities and influence of anomalous scattering on them allowed us to choose twin elements and atomic configurations of twin domains for all the investigated specimens.

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Доп.точки доступа:
Verin, I. A.; Aleksandrov, K. S.; Александров, Кирилл Сергеевич; European meeting on ferroelectricity(7 ; 1991 ; Jul ; 08-12 ; Dijon, France)
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3.


   
    Study of structural and physical-properties of cesium and lithium double sulfate / K. S. Aleksandrov [и др.] // Fiz. Tverd. Tela. - 1980. - Vol. 22, Is. 12. - P. 3673-3677. - Cited References: 6 . - ISSN 0367-3294

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Публикация на русском языке Исследование структурных и физических свойств двойного сульфата и цезия и лития [Текст] / К. С. Александров [и др.] // Физ. тверд. тела. - 1980. - Т. 22 Вып. 12. - С. 3673-3677


Доп.точки доступа:
Aleksandrov, K. S.; Александров, Кирилл Сергеевич; Zherebtsova, L. I.; Iskornev, I. M.; Искорнев, Игорь Михайлович; Kruglik, A. I.; Круглик, Анатолий Иванович; Rozanov, O. V.; Flerov, I. N.; Флёров, Игорь Николаевич
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4.


   
    Investigation of structural and physical properties of cesium-lithium double sulfate / K. S. Aleksandrov [и др.] // Sov. Phys. Solid State. - 1980. - Vol. 22, Is. 12. - P. 2150-2152 ; Phys. Solid State . - ISSN 0584-5807
Кл.слова (ненормированные):
LITHIUM COMPOUNDS -- FERROELASTICITY -- PHASE TRANSITIONS -- CESIUM COMPOUNDS
Аннотация: A study was made of the temperature dependences of the integrated intensities of the 006 and 021 x-ray reflections, deviation of the angle gamma from 90 degree , NMR of **7Li, specific heat c//p, thermal expansion, and permittivity. Moreover, the effects of hydrostatic pressure on the phase transition were studied. It was definitely established that a ferroelastic phase transition of the second kind occurs at 202. 07 degree K and this transition does not alter the number of atoms in a unit cell.

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Доп.точки доступа:
Aleksandrov, K. S.; Zherebtsova, L. I.; Iskornev, I. M.; Kruglik, A. I.; Rozanov, O. V.; Flerov, I. N.

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5.


   
    Layered hydroxyl sulfate: Controlled crystallization, structure analysis, and green derivation of multi-color luminescent (La,RE)2O2SO4 and (La,RE)2O2S phosphors (RE = Pr, Sm, Eu, Tb, and Dy) / X. Wang [et al.] // Chem. Eng. J. - 2016. - Vol. 302. - P. 577-586, DOI 10.1016/j.cej.2016.05.089. - Cited References: 50. - This work is supported in part by the National Natural Science Foundation of China (Grants Nos. 51172038, 51302032, and U1302272), the Fundamental Research Fund for the Central Universities (Grant No. N140204002), Grants-in-Aid for Scientific Research (KAKENHI No. 26420686), and the Russian Foundation for Basic Research (15-52-53080). X.J. Wang acknowledges financial support from the China Scholarship Council for her overseas Ph.D. study (Contract No. 201406080035) and the assistance of Q. Q. Zhu (University of Science and Technology of China) for his help with calcination. . - ISSN 1385-8947
   Перевод заглавия: Слоистые гидроксил сульфаты: контролируемая кристаллизация, структурный анализ, и зеленый синтез мультицветных люминофоров (La,RE)2O2SO4 и (La,RE)2O2S (RE=Pr, Sm, Eu, Tb, and Dy)
РУБ Engineering, Environmental + Engineering, Chemical
Рубрики:
PHOTOLUMINESCENCE PROPERTIES
   OXYSULFATE/OXYSULFIDE SYSTEMS

   CRYSTAL-STRUCTURE

   OXYGEN-STORAGE

   Ln

   NANOCOMPOSITES

   EMISSION

   CAPACITY

   FAMILY

   FABRICATION

Кл.слова (ненормированные):
Sulfate type layered rare earth hydroxide -- Luminescence -- Oxysulfate -- Oxysulfide
Аннотация: The two important groups of Ln2O2SO4 and Ln2O2S compounds are traditionally synthesized with the involvements of environmentally harmful sulfur-containing reagents. We developed in this work a unique green approach for their synthesis, using Ln2(OH)4SO4·2H2O layered hydroxyl sulfate as the precursor (Ln-241 phase). Phase selective crystallization of La-241 under both atmospheric pressure and hydrothermal conditions was firstly optimized, followed by transformation into La2O2S and La2O2SO4 by controlled calcination. Rietveld structure refinement was performed for La-241, La(OH)SO4, La2O2SO4, and La2O2S, and the crystal structure and cell parameters of La-241 were originally reported. The photoluminescence performances of several important activators (Pr3+, Sm3+, Eu3+, Tb3+, and Dy3+) in the two hosts, in terms of excitation, emission, quantum yield, and color coordinates of emission, were thoroughly investigated, and multi-color luminescence including bright red, green, orange red, and yellow was obtained under ultraviolet excitation. Detailed investigations of Tb3+ photoluminescence revealed that the lack of 5D3 emission in La2O2S and the gradual quenching of 5D3 blue emission at a higher Tb3+ content (hence decreasing I488/I545 ratio and changing color coordinates) in La2O2SO4 were suggested to be due to thermal activation of the 5D3 electrons into the conduction band and cross relaxation between adjacent Tb3+, respectively. The synthesis approach developed in this work for La2O2SO4 and La2O2S, with water vapor as the only exhaust gas, is environmentally benign and holds great potential in the facile synthesis of analogous compounds of other lanthanides. © 2016 Elsevier B.V.

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Держатели документа:
Key Laboratory for Anisotropy and Texture of Materials (Ministry of Education), School of Materials Science and Engineering, Northeastern University, Shenyang, Liaoning, China
Advanced Materials Processing Unit, National Institute for Materials Science, Tsukuba, Ibaraki, Japan
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation

Доп.точки доступа:
Wang, X.; Li, J. -G.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Zhu, Q.; Li, X.; Sun, X.
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6.


   
    State of iron in nanoparticles prepared by impregnation of silica gel and aluminum oxide with FeSO4 solutions / G. A. Bukhtiyarova [et al.] // Phys. Solid State. - 2010. - Vol. 52, Is. 4. - P. 826-837, DOI 10.1134/S1063783410040268. - Cited References: 27. - This study was supported by the Presidium of the Russian Academy of Sciences within the framework of the Program no. 27 "Principles of Basic Research of Nanotechnologies and Nanomaterials," Project no. 46 "Magnetically Ordered Nanoparticles in Catalytic Systems: Synthesis, Evolution, and Physicochemical Properties." . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
THERMAL-DECOMPOSITION
   BETA-FEOOH

   MOSSBAUER

   FERRIHYDRITE

   EPSILON-FE2O3

   FE-2(SO4)(3)

   SULFATE

   FE-57

Аннотация: The state of iron in nanoparticles prepared by impregnating silica gel and aluminum oxide with iron(II) sulfate solutions has been investigated using Mossbauer spectroscopy. It has been revealed that the state of iron depends on the nature of the support. Iron(III) hydroxysulfate and iron(III) oxysulfate nanoparticles are formed on the surface of silica gel, and iron oxide nanoparticles are formed on the surface of aluminum oxide. An increase in the concentration of iron ions or in the size of iron-containing particles leads to hydration of the nanoparticle surface. The calcination of the samples results in the formation of E -Fe2O3 oxide in a strongly disordered or amorphous state in iron-containing particles on the surface of silica gel.

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Держатели документа:
[Bukhtiyarova, G. A.
Mart'yanov, O. N.
Yakushkin, S. S.
Shuvaeva, M. A.] Russian Acad Sci, Siberian Branch, Boreskov Inst Catalysis, Novosibirsk 630090, Russia
[Bayukov, O. A.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
ИФ СО РАН
Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent'eva 5, Novosibirsk 630090, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Bukhtiyarova, G. A.; Mart'yanov, O. N.; Yakushkin, S. S.; Shuvaeva, M. A.; Bayukov, O. A.; Баюков, Олег Артемьевич
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7.


    Flerov, I. N.
    Heat capacity and phase transitions in NH4LiSO4, Cs-x(NH4)(1-x) LiSO4, and RbLiSO4 / I. N. Flerov, A. V. Kartashev, V. A. Grankina // Phys. Solid State. - 2005. - Vol. 47, Is. 4. - P. 720-728, DOI 10.1134/1.1913987. - Cited References: 29 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
ROOM-TEMPERATURE
   MONTE-CARLO

   LINH4SO4

   SUBSTITUTION

   CRYSTALS

   SULFATE

   CSLISO4

Аннотация: The heat capacity of NH4LiSO4, RbLiSO4, and Cs-x(NH4)(1 - x) LiSO4 crystals and its behavior over a broad temperature range including the phase transition regions were studied. The entropy changes corresponding to structural transformations in these crystals were found not to be characteristic of straightforward ordering of structural blocks. The results obtained are discussed in terms of phenomenological theory and model concepts. (C) 2005 Pleiades Publishing, Inc.

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kartashev, A. V.; Карташев, Андрей Васильевич; Grankina, V. A.; Флёров, Игорь Николаевич
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8.


    Mel'nikova, S. V.
    Optical investigations of the effect of gradual substitution NH4 - Cs on the ferroelastic phase transition in a CsLiSO4 crystal / S. V. Mel'nikova, V. A. Grankina // Phys. Solid State. - 2004. - Vol. 46, Is. 3. - P. 515-520, DOI 10.1134/1.1687871. - Cited References: 14 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
AMMONIUM LITHIUM-SULFATE
   TEMPERATURE PHASE

   NH4LISO4

Аннотация: Crystals of Cs-x(NH4)(1 - x)LiSO4 (0.39 less than or equal to x less than or equal to 1.0) solid solutions are grown and investigated using polarized light microscopy and measurements of the birefringence in the temperature range 100-530 K. The (x-T) phase diagram of the Cs-x(NH4)(1 - x)LiSO4 solid solutions is constructed. It is demonstrated that, upon substitution of ammonium for cesium in the CsLiSO4 crystal, the phase transition temperature gradually increases to such a degree that the ferroelastic phase can exist at room temperature. The triple point of intersection of the Pmcn, P2(1)cn, and P112(1)/n phase boundaries is determined. It is established that the introduction of ammonium in small amounts has an unusually strong effect on the refractive properties and character of the ferroelastic phase transition in the CsLiSO4 crystal. (C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Grankina, V. A.; Мельникова, Светлана Владимировна
}
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9.


   
    Nuclear spin resonance study of the ion mobility in a KHSeO4 crystal / Y. N. Ivanov [et al.] // Phys. Solid State. - 2004. - Vol. 46, Is. 10. - P. 1845-1850, DOI 10.1134/1.1809417. - Cited References: 15 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
POTASSIUM HYDROGEN SULFATE
   EXCHANGE NMR

   SOLIDS

Аннотация: The ion mobility in a crystal of partially deuterated potassium hydroselenate (KHSe) was studied using nuclear spin resonance (NSR) of H-1, H-2, Se-77, and K-39 in a wide temperature range. The temperature dependences of the deuterium NSR spectra above 360 K exhibit changes in the line shape characteristic of chemical exchange processes. These exchange processes were studied in detail using two-dimensional H-2 NSR spectroscopy. It was ascertained that the exchange between deuterons of hydrogen bonds take place in the entire temperature range under study. However, the measured conductivity was approximately one-hundredfold lower than that estimated from the exchange frequencies. It was assumed that the low conductivity in the temperature range under study is caused by closed dimers of SeO4 groups in the KHSe structure. (C) 2004 MAIK "Nauka / Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
Univ Leipzig, D-04103 Leipzig, Germany
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Leipzig University, Leipzig, D-04103, Germany

Доп.точки доступа:
Ivanov, Y. N.; Иванов, Юрий Николаевич; Sukhovskii, A. A.; Суховский, Андрей Андреевич; Aleksandrova, I. P.; Александрова, Инга Петровна; Totz, J.; Michel, D.
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10.


   
    Investigation of the reconstructive phase transition between metastable (alpha) and stable (beta) modifications of the NH4LiSO4 crystal / S. V. Mel'nikova [et al.] // Phys. Solid State. - 2003. - Vol. 45, Is. 8. - P. 1572-1578, DOI 10.1134/1.1602898. - Cited References: 13 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
AMMONIUM LITHIUM-SULFATE
   LINH4SO4

   TEMPERATURE

Аннотация: Crystals of ammonium lithium sulfate NH4LiSO4 in alpha and beta modifications are studied, and conditions of their nucleation and growth are determined. The alpha modification of NH4LiSO4 and alpha--beta phase transitions are investigated using polarized light microscopy, x-ray diffraction, and differential scanning calorimetry in the temperature range 80-530 K. It is found that, depending on the conditions of growth and storage, there exist two temperature ranges (T(alpha--beta)approximate to340-350 and approximate to440-450 K) in which the crystals can undergo an alpha--beta reconstructive phase transition. The enthalpy of this transformation depends on the symmetry of the final phase. In the former case (340-350 K), the reconstructive phase transition leads to rapid destruction of the sample. In the latter case (440-450 K), the crystal structure undergoes a slow transformation (recrystallization) without noticeable distortions. The results obtained indicate that no structural phase transition occurs in the alpha modification of NH4LiSO4 at 250 K. (C) 2003 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, Siberian Div, LV Kirensky Phys Inst, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Mel'nikova, S. V.; Мельникова, Светлана Владимировна; Kartashev, A. V.; Карташев, Андрей Васильевич; Grankina, V. A.; Flerov, I. N.; Флёров, Игорь Николаевич
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11.


    Mel'nikova, S. V.
    A study of the effect of gradual substitution NH4 - Cs on phase transitions in NH4LiSO4 crystals / S. V. Mel'nikova, V. A. Grankina, A. V. Kartashev // Phys. Solid State. - 2002. - Vol. 44, Is. 2. - P. 379-385, DOI 10.1134/1.1451032. - Cited References: 22 . - ISSN 1063-7834
РУБ Physics, Condensed Matter
Рубрики:
MIXED-CRYSTALS
   TEMPERATURE PHASE

   LINH4SO4

   BIREFRINGENCE

   SULFATE

   RAMAN

Аннотация: Solid solutions in the Cs-x(NH4)(1 - x)LiSO4 (0 less than or equal to x less than or equal to 0.35) system are grown and investigated. The birefringence (n(a) - n(b)) and the heat capacity are measured in the temperature range 100-530 K. The (x-T) phase diagram is constructed. It is demonstrated that the substitution of cesium for ammonium in the NH4LiSO4 crystal affects the transition temperatures in such a way that the region of the ferroelectric phase increases and the ferroelastic phase disappears at x 0.22. The character of the high-temperature transition remains unchanged (2beta = 0.24 +/- 0.01 for all compositions), but the birefringence anomaly and enthalpy decrease. As the concentration x increases, the low-temperature transition becomes more similar to a first-order transition: the birefringence jump deltan and the temperature hysteresis DeltaT increase. (C) 2002 MAIK "Nauka/Interperiodica".

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Держатели документа:
Russian Acad Sci, LV Kirensky Phys Inst, Siberian Div, Krasnoyarsk 660036, Russia
ИФ СО РАН
Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation

Доп.точки доступа:
Grankina, V. A.; Kartashev, A. V.; Карташев, Андрей Васильевич; Мельникова, Светлана Владимировна
}
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12.


   
    Intensive electrocaloric effect in triglycine sulfate under nonequilibrium thermal conditions and periodic electric field / V. S. Bondarev [et al.] // Phys. Status Solidi B. - 2016. - Vol. 253, Is. 10. - P. 2073-2078, DOI 10.1002/pssb.201600339. - Cited References:29. - The reported study was funded by RFBR and Government of Krasnoyarsk Territory according to the research project no. 16-42-240428 p_a. . - ISSN 0370-1972. - ISSN 1521-3951
   Перевод заглавия: Интенсивный электрокалорический эффект в триглицинсульфате в неравновесных тепловых условиях и периодическом электрическом поле
РУБ Physics, Condensed Matter

Кл.слова (ненормированные):
electrocaloric effect -- ferroelectrics -- nonequilibrium processes -- phase -- transitions
Аннотация: We present the results of both direct measurements and modeling of the intensive electrocaloric effect ΔTAD in ferroelectric triglycine sulfate under nonequilibrium thermal conditions and periodically varying electric field. In the narrow region around the phase transition temperature TC, a visible difference was observed between the electrocaloric responses at applying ΔTON and removal ΔTOFF of the constant electric field: |ΔTON| <|ΔTOFF| and |ΔTON| > |ΔTOFF| at T < TC and T > TC, respectively. The variation of the frequency and profile of the periodic electric field at T < TC allowed one to obtain the gradual decrease in the average temperature of the top of the sample compared to the bottom kept at the constant temperature. At low frequency electric field, qualitative agreement was found between the time dependences of the measured experimentally and calculated ΔT values. Experimental and modeling studies of electrocaloric effect ΔTAD in triglycine sulfate showed that the applying/removal of a periodic electric field to/from the bulk sample decreases the average value of the waiving temperature of the top Ttop compared to T ≃ const of the bottom. Both frequency and duty cycle of the electric field impulses strongly affect Ttop.

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Держатели документа:
Kirensky Inst Phys, Siberian Branch RAS, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radioelect, Krasnoyarsk 660074, Russia.

Доп.точки доступа:
Bondarev, V. S.; Бондарев, Виталий Сергеевич; Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Gorev, M. V.; Горев, Михаил Васильевич; Flerov, I. N.; Флёров, Игорь Николаевич; RFBR; Government of Krasnoyarsk Territory [16-42-240428 p_a]
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13.


   
    Electrocaloric effect in triglycine sulfate under equilibrium and nonequilibrium thermodynamic conditions / V. S. Bondarev [et al.] // Phys. Solid State. - 2017. - Vol. 59, Is. 6. - P. 1118-1126, DOI 10.1134/S1063783417060051. - Cited References:25. - The reported study was funded by Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund to the research, project no. 16-42-240428r_a. . - ISSN 1063-7834. - ISSN 1090-6460
РУБ Physics, Condensed Matter
Рубрики:
PERIODIC ELECTRIC-FIELD
Аннотация: The direct and indirect measurements of intensive electrocaloric effect in a triglycine sulfate ferroelectric crystal are performed under equilibrium and nonequilibrium thermodynamic conditions implemented in the adiabatic calorimeter. The effect of the electric field parameters (frequency, profile, and strength) on the value of the effect and degree of its reversibility are studied. The difference between the temperature variation values in a switched-on and switched-off dc field under quasi-isothermal conditions is established. The low-frequency periodic electric field induces the temperature gradient along the electrocaloric element and heat flux from its free end to the thermostated base. A significant excess of the field switching-off rate over the switching-on rate leads to a noticeable intensification of the cooling effect.

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Публикация на русском языке Электрокалорический эффект в триглицинсульфате в равновесных и неравновесных термодинамических условиях [Текст] / В. С. Бондарев [и др.] // Физ. тверд. тела : Наука, 2017. - Т. 59 Вып. 6. - С. 1097–1105

Держатели документа:
Russian Acad Sci, Siberian Branch, Kirensky Inst Phys, Fed Res Ctr,Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Krasnoyarsk 660041, Russia.

Доп.точки доступа:
Bondarev, V. S.; Бондарев, Виталий Сергеевич; Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Flerov, I. N.; Флёров, Игорь Николаевич; Gorev, M. V.; Горев, Михаил Васильевич; Russian Foundation for Basic Research, Government of Krasnoyarsk Territory, Krasnoyarsk Region Science and Technology Support Fund [16-42-240428r_a]
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14.


   
    Effect of a restricted geometry on thermal and dielectric properties of NH4HSO4 ferroelectric / E. A. Mikhaleva [et al.] // Ferroelectrics. - 2017. - Vol. 513, Is. 1. - P. 44-50, DOI 10.1080/00150193.2017.1350436. - Cited References:17. - The reported study was partially supported by the Russian Foundation for Basic Research (RFBR), research project No. 16-32-00092 mol_a. . - ISSN 0015-0193. - ISSN 1563-5112
   Перевод заглавия: Влияние ограниченной геометрии на тепловые и диэлектрические свойства сегнетоэлектриков NH4HSO4
РУБ Materials Science, Multidisciplinary + Physics, Condensed Matter
Рубрики:
PHASE-TRANSITIONS
   AMMONIUM

   CAPACITY

   SULFATE

   KH2PO4

Кл.слова (ненормированные):
Ferroelectric -- phase transition -- porous glass -- nanocomposite
Аннотация: Heat capacity, thermal dilatation, sensitivity to pressure and permittivity of NH4HSO4 embedded into glass matrices with a pore size of 320 nm and 46 nm were studied. Large difference in the thermal expansion of both glass and ferroelectric leads to a "clamped" state of NH4HSO4 in nanocomposites and to the phase transition temperatures change. The restricted geometry does not effect on the order of successive transformations in NH4HSO4 but is accompanied by a significant reduction in entropy of phase transitions. The behavior of DTA-signal and permittivity show the expansion of the temperature range of the ferroelectric phase under hydrostatic pressure.

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Доп.точки доступа:
Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Flerov, I. N.; Флёров, Игорь Николаевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Gorev, M. V.; Горев, Михаил Васильевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Korotkov, L. N.; Rysiakiewicz-Pasek, E.; Russian Foundation for Basic Research (RFBR) [16-32-00092 mol_a]; Russia/CIS/Baltic/Japan Symposium on Ferroelectricity(13 ; 2016 ; Jun. ; 19-23 ; Matsue, Japan)
}
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15.


   
    Effect of restricted geometry and external pressure on the phase transitions in ammonium hydrogen sulfate confined in a nanoporous glass matrix / E. A. Mikhaleva [et al.] // J. Mater. Sci. - 2018. - Vol. 53, Is. 15. - P. 12132–12144, DOI 10.1007/s10853-018-2467-1. - Cited References: 44. - The reported study was funded by Russian Foundation for Basic Research (RFBR) according to the Research Project No. 16-32-00092 mol_a. . - ISSN 0022-2461
   Перевод заглавия: Влияние ограниченной геометрии и внешнего давления на фазовые переходы в кислом сульфате аммония заключенном в нанопористую стеклянную матрицу
Кл.слова (ненормированные):
Hydraulics -- Hydrostatic pressure -- Permittivity -- Pore size -- Specific heat -- Sulfur compounds -- Thermal expansion
Аннотация: A study of heat capacity, thermal dilatation, susceptibility to hydrostatic pressure, permittivity and polarization loops was carried out on NH4HSO4–porous glass nanocomposites (AHS + PG) as well as empty glass matrices. The formation of dendrite clusters of AHS with a size, dcryst, exceeding the pore size was found. An insignificant anisotropy of thermal expansion of AHS + PG showing statistically uniform distribution of AHS with random orientations of nanocrystallites over the matrix was observed. The effect of internal and external pressures on thermal properties and permittivity was studied. At the phase transition P-1 ↔ Pc, a strongly nonlinear decrease in the entropy ΔS2 and volume strain (ΔV/V)T2 was observed with decreasing dcryst. The linear change in temperatures of both phase transitions P-1 ↔ Pc ↔ P21/c under hydrostatic pressure is accompanied by the expansion of the temperature range of existence of the ferroelectric phase Pc, while this interval narrows as dcryst decreases.

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Держатели документа:
Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, Bld. 38, Krasnoyarsk, Russian Federation
Siberian Federal University, Krasnoyarsk, Russian Federation
Astafijev Krasnoyarsk State Pedagogical University, Krasnoyarsk, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, Russian Federation
Krasnoyarsk State Agrarian University, Krasnoyarsk, Russian Federation
Voronezh State Technical University, Voronezh, Russian Federation
Division of Experimental Physics, Faculty of Fundamental Problems of Technology, Wroclaw University of Science and Technology, Wroclaw, Poland

Доп.точки доступа:
Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Flerov, I. N.; Флёров, Игорь Николаевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Gorev, M. V.; Горев, Михаил Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Bogdanov, E. V.; Богданов, Евгений Витальевич; Bondarev, V. S.; Бондарев, Виталий Сергеевич; Korotkov, L. N.; Rysiakiewicz-Pasek, E.
}
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16.


   
    Specific heat and thermal expansion of triglycine sulfate-porous glass nanocomposites / E. A. Mikhaleva [et al.] // Phys. Solid State. - 2018. - Vol. 60, Is. 7. - P. 1338-1343, DOI 10.1134/S1063783418070181. - Cited References: 27. - This study was supported by the Russian Foundation for Basic Research, project no. 16-32-00092 mol-a. . - ISSN 1063-7834. - ISSN 1090-6460
РУБ Physics, Condensed Matter
Рубрики:
PHASE-TRANSITIONS
   DIELECTRIC-PROPERTIES

   FERROELECTRIC COMPOSITES

Аннотация: The effect of restricted geometry on specific heat capacity and thermal expansion of the triglycine sulfate (TGS)–borosilicate glass composites have been studied first. A decrease in the entropy and temperature of the P21 ↔ P21/m phase transition in the TGS component with decreasing the glass matrix pore diameter at the invariable specific heat and thermal expansion coefficient has been observed. The estimates are indicative of the minor effect of internal pressure on the TGS pressure coefficient dTC/dp in the composites.

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Публикация на русском языке Теплоемкость и тепловое расширение нанокомпозитов триглицинсульфат-пористое стекло [Текст] / Е. А. Михалева [и др.] // Физ. тверд. тела. - 2018. - Т. 60 Вып. 7. - С. 1328–1333

Держатели документа:
Russian Acad Sci, Kirensky Inst Phys, Siberian Branch, Krasnoyarsk Sci Ctr, Krasnoyarsk 660036, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk 660041, Russia.
Krasnoyarsk State Pedag Univ, Krasnoyarsk 660060, Russia.
Far Eastern State Transport Univ, Khabarovsk 680000, Russia.
Voronezh State Tech Univ, Voronezh 394000, Russia.
Wroclaw Univ Sci & Technol, Fac Fundamental Problems & Technol, Div Expt Phys, PL-50370 Wroclaw, Poland.

Доп.точки доступа:
Mikhaleva, E. A.; Михалева, Екатерина Андреевна; Flerov, I. N.; Флёров, Игорь Николаевич; Kartashev, A. V.; Карташев, Андрей Васильевич; Gorev, M. V.; Горев, Михаил Васильевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Korotkov, L. N.; Rysiakiewicz-Pasek, E.; Russian Foundation for Basic Research [16-32-00092 mol-a]
}
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17.


   
    Exploration of structural, thermal and spectroscopic properties of self-activated sulfate Eu2(SO4)3 with isolated SO4 groups / Y. G. Denisenko [et al.] // J. Ind. Eng. Chem. - 2018. - Vol. 68. - P. 109-116, DOI 10.1016/j.jiec.2018.07.034. - Cited References: 83. - This work was supported by the Russian Foundation for Basic Research ( 16-52-48010 , 17-52-53031 ). The equipments of the Collective Use Center — Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch Russian Academy of Sciences [ http://ccu.kirensky.ru/ ] was used. . - ISSN 1226-086X
   Перевод заглавия: Исследование структурных, тепловых и спектроскопических свойств самоактивируемого сульфата с изолированными SO4
Кл.слова (ненормированные):
Europium sulfate -- Synthesis -- Structure -- Thermal analysis -- Photoluminescence
Аннотация: Eu2(SO4)3 was synthesized by chemical precipitation method and the crystal structure was determined by Rietveld analysis. The compound crystallizes in monoclinic space group С2/с. In the air environment, Eu2(SO4)3 is stable up to 670 °C. The sample of Eu2(SO4)3 was examined by Raman, Fourier-transform infrared absorption and luminescence spectroscopy methods. The low site symmetry of SO4 tetrahedra results in the appearance of the IR inactive ν1 mode around 1000 cm−1 and ν2 modes below 500 cm−1. The band intensities redistribution in the luminescent spectra of Eu3+ ions is analyzed in terms of the peculiarities of its local environment.

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Держатели документа:
Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation

Доп.точки доступа:
Denisenko, Y. G.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Atuchin, V. V.; Krylov, A. S.; Крылов, Александр Сергеевич; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Shestakov, N. P.; Шестаков, Николай Петрович; Andreev, O. V.
}
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18.


   
    Structure, thermal stability, and spectroscopic properties of triclinic Double sulfate AgEu(SO4)2 with isolated SO4 groups / Y. G. Denisenko [et al.] // Inorg. Chem. - 2018. - Vol. 57, Is. 21. - P. 13279-13288, DOI 10.1021/acs.inorgchem.8b01837. - Cited References: 81. - This work was supported by the Russian Foundation for Basic Research (Grants 16-52-48010 and 17-52-53031). The equipment of the Collective Use Center, Kirensky Institute of Physics, Federal Research Center KSC Siberian Branch Russian Academy of Sciences (http://ccu.kirensky.ru/) were used. . - ISSN 0020-1669
   Перевод заглавия: Структура, термическая стабильность и спектроскопические свойства триклинного двойного сульфата AgEu(SO4)2 с изолированными группами SO4
Аннотация: Silver–europium double sulfate AgEu(SO4)2 was obtained by solid-phase reaction between Ag2SO4 and Eu2(SO4)3. The crystal structure of AgEu(SO4)2 was determined by Monte Carlo method with simulated annealing, and after that, it was refined by the Rietveld method from X-ray powder diffraction data. The compound crystallizes in the triclinic symmetry, space group P1̅ (a = 0.632929(4), b = 0.690705(4), c = 0.705467(4) nm, α = 98.9614(4), β = 84.5501(4), γ = 88.8201(4)°, V = 0.303069(3) nm3). Two types of sulfate tetrahedra were found in the structure, which significantly affects the spectroscopic properties in the IR-range. In the temperature range of 143–703 K, the average linear thermal expansion coefficients of cell parameters a, b, and c are very similar, (1.11–1.67) × 10–5 K–1 in magnitude, and therefore, AgEu(SO4)2 expands almost isotropically. Upon heating in argon flow, AgEu(SO4)2 is stable up to 1053 K. The luminescence spectra in the region of ultranarrow 5D0–7F0 transition contain a single narrow and symmetric line at 579.5 nm that is evidence of good crystalline quality of AgEu(SO4)2 and uniform local environment of Eu3+ ions in the structure. Distribution of luminescence bands is determined by the environment of Eu3+ ions in the structure. Influence of Ag+ ions on the electron density distribution at Eu sites is detected.

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Держатели документа:
Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC, SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics, Federal Research Center KSC, SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC, SB RAS, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Denisenko, Y. G.; Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Volkova, S. S.; Andreev, O. V.
}
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19.


   
    Negative thermal expansion in one-dimension of a new double sulfate AgHo(SO4)2 with isolated SO4 tetrahedra / Y. G. Denisenko, V. V. Atuchin, M. S. Molokeev [et al.] // J. Mater. Sci. Technol. - 2021. - Vol. 76. - P. 111-121, DOI 10.1016/j.jmst.2020.10.026. - Cited References: 55. - This work was financially supported by the Russian Foundation for Basic Research (Nos. 18-02-00754 and 18-32-20011 ), the National Scientific Foundations of China (No. 11974360 ) and the Russian Science Foundation (No. 19-42-02003 , in the part of conceptualization). M.S. Molokeev, A.S. Aleksandrovsky, A.S. Krylov, and A.S. Oreshonkov are grateful to Basic Project of the Ministry of Science of the Russian Federation in part of XRD, luminescent and Raman studies. IR-spectrometry was performed using resources of the Research Resource Center "Natural Resource Management and Physico-Chemical Research". Use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS» is acknowledged . - ISSN 1005-0302
   Перевод заглавия: Отрицательное тепловое расширение в одном направлении двойного сульфата AgHo(SO4)2 с изолированными тетраэдрами SO4
Кл.слова (ненормированные):
Sulfate -- Crystal structure -- Thermal expansion -- Raman -- Photoluminescence -- Band structure
Аннотация: A double holmium-silver sulfate was obtained for the first time. The temperature intervals for the formation and stability of the compound were determined by differential scanning calorimetry. The crystal structure of AgHo(SO4)2 was determined by Rietveld method. The X-ray diffraction (XRD) analysis showed that the compound crystallizes in the monoclinic syngony, space group P21/m, with the unit cell parameters a = 4.71751 (4) Å, b = 6.84940 (6) Å and c = 9.89528 (9) Å, β = 95.1466 (4)°, V = 318.448 (5) Å3, Z = 2, RB = 1.55 %, T = 303 K. Two types of sulfate tetrahedra were found in the structure, which significantly affected the spectral properties in the infrared range. In the temperature range of 143−703 K, a negative thermal expansion along the b direction accompanied by a positive thermal expansion along the a and c directions was observed. It was established that negative thermal expansion is the result of the deformation of sulfate tetrahedra, which is affected by the movement of holmium and silver atoms. The excitation in the blue spectral range (457.9 nm) produces a luminescence in light blue (489 nm), green (545 nm) and red (654 nm) spectral ranges, and the latter two were of comparable intensity that is favorable for WLED sources. The observed luminescent band distribution is ascribed to the specific crystal field at Ho3+ ion sites rather than a variation of radiationless probability.

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Держатели документа:
Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University of Giessen, Giessen, 35392, Germany
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Laboratory of Optical Materials and Structures, Institute of Semiconductor Physics, SB RAS, Novosibirsk, 630090, Russian Federation
Laboratory of Semiconductor and Dielectric Materials, Novosibirsk State University, Novosibirsk, 630090, Russian Federation
Research and Development Department, Kemerovo State University, Kemerovo, 650000, Russian Federation
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
Laboratory of Coherent Optics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Center for Materials Research (LaMa), Justus-Liebig-University Giessen, Giessen, 35392, Germany
University of the Chinese Academy of Sciences, Beijing, 100049, China
Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation

Доп.точки доступа:
Denisenko, Y. G.; Atuchin, V. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Wang, N.; Jiang, X.; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Sedykh, A. E.; Volkova, S. S.; Lin, Z.; Andreev, O. V.; Muller-Buschbaum, K.
}
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20.


   
    Crystal and electronic structure, thermochemical and photophysical properties of europium-silver sulfate monohydrate AgEu(SO4)2·H2O / Y. G. Denisenko, A. E. Sedykh, M. S. Molokeev [et al.] // J. Solid State Chem. - 2021. - Vol. 294. - Ст. 121898, DOI 10.1016/j.jssc.2020.121898. - Cited References: 54. - This work was partially supported by the Russian Foundation for Basic Research (Grant 19-33-90258∖19 ). Use of equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center « Krasnoyarsk Science Center SB RAS» is acknowledged . - ISSN 0022-4596
   Перевод заглавия: Кристаллическая и электронная структура, термохимические и фотофизические свойства моногидрата сульфата европия-серебра AgEu(SO4)2·H2O
Кл.слова (ненормированные):
Structure -- Thermochemistry -- Luminescence -- Sulfates -- Europium
Аннотация: In order to synthesize single crystals of europium-silver double sulfate monohydrate, a hydrothermal reaction route was used. It was found that the crystallization cannot be performed under standard conditions. The compound AgEu(SO4)2·H2O crystallizes in the trigonal crystal system, space group P3221 (a ​= ​6.917(1), c ​= ​12.996(2) Å, V ​= ​538.53(17) Å3). The structure consists of triple-capped trigonal prisms [EuO9], in which one oxygen atom belongs to crystalline water, silver octahedra [AgO6], and sulfate tetrahedra [SO4]. The hydrogen bonds in the system additionally stabilize the structure. The electronic band structure wasstudied by density functional theory calculations which show that AgEu(SO4)2·H2O is an indirect band gap dielectric. Temperature dependent photoluminescence spectroscopy shows emission bands of transitions from the 5D0 state to the spin-orbit components of the 7FJmultiplet (J ​= ​0–6).The ultranarrow transition 5D0 - 7F0 shows a red shift with respect to other europium-containing water-free sulfates that is ascribed to the presence of OH group in the crystal structure in the close vicinity of the Eu3+ ion. An effect of abnormal sensitivity of the Ω4 intensity factor to minor distortions of the local environment is detected for the observed low local symmetry of C2.

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Держатели документа:
Institute of Chemistry, Tyumen State University, Tyumen, 625003, Russian Federation
Institute of Inorganic and Analytical Chemistry, Justus-Liebig-University of Giessen, Giessen35392, Germany
Department of General and Special Chemistry, Industrial University of Tyumen, Tyumen, 625000, Russian Federation
Center for Materials Research (LaMa), Justus-Liebig-University of Giessen, Giessen35392, Germany
Laboratory of Crystal Physics, Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Department of Physics, Far Eastern State Transport University, Khabarovsk, 680021, Russian Federation
Laboratory of Molecular Spectroscopy, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Laboratory of Coherent Optics, Kirensky Institute of Physics Federal Research Center KSC SB RAS, Krasnoyarsk, 660036, Russian Federation
Institute of Nanotechnology, Spectroscopy and Quantum Chemistry, Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Komissarov Department of General Chemistry, Northen Trans-Ural Agricultural University, Tyumen, 625003, Russian Federation
Laboratory of the Chemistry of Rare Earth Compounds, Institute of Solid State Chemistry, UB RAS, Ekaterinburg, 620137, Russian Federation

Доп.точки доступа:
Denisenko, Y. G.; Sedykh, A. E.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Aleksandrovsky, A. S.; Александровский, Александр Сергеевич; Krylov, A. S.; Крылов, Александр Сергеевич; Khritokhin, N. A.; Sal'nikova, E. I.; Andreev, O. V.; Muller-Buschbaum, K.
}
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