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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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Magnetic properties of biomineral particles produced by bacteria Klebsiella oxytoca / Y. L. Raikher [et al.] // Phys. Solid State. - 2010. - Vol. 52, Is. 2. - P. 298-305, DOI 10.1134/S1063783410020125. - Cited References: 29. - This study was supported by the Russian Foundation for Basic Research (project nos. 07-02-96026, 07- 02-96017, and 08-02-00802) and performed within the framework of the Federal Target Program "Research and Research-Pedagogical Personnel of Innovation Russia for 2009-2013." . - ISSN 1063-7834

РУБ Physics, Condensed Matter
Рубрики:
FERRITIN
   NANOPARTICLES
   IRON
   SUSCEPTIBILITY
   FERRIHYDRITE
   BEHAVIOR
   FINS
Аннотация: Ferrihydrite nanoparticles (2-5 nm in size) produced by bacteria Klebsiella oxytoca in the course of biomineralization of iron salt solutions from a natural medium exhibit unique magnetic properties: they are characterized by both the antiferromagnetic order inherent in a bulk ferrihydrite and the spontaneous magnetic moment due to the decompensation of spins in sublattices of a nanoparticle. The magnetic susceptibility enhanced by the superantiferromagnetism effect and the magnetic moment independent of the magnetic field provide the possibility of magnetically controlling these natural objects. This has opened up the possibilities for their use in nanomedicine and bioengineering. The results obtained from measurements of the magnetic properties of the ferrihydrite produced by Klebsiella oxytoca in its two main crystalline modifications are reported, and the data obtained are analyzed theoretically. This has made it possible to determine numerical values of the magnetic parameters of real biomineral nanoparticles.

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Держатели документа:
[Raikher, Yu. L.
Stepanov, V. I.] Russian Acad Sci, Ural Div, Inst Continuum Media Mech, Perm 614013, Russia
[Stolyar, S. V.
Balaev, D. A.] Russian Acad Sci, LV Kirensky Phys Inst, Siberian Branch, Krasnoyarsk 660036, Russia
[Stolyar, S. V.
Balaev, D. A.
Ishchenko, L. A.] Siberian Fed Univ, Krasnoyarsk 660041, Russia
[Ladygina, V. P.] Russian Acad Sci, Siberian Branch, Krasnoyarsk Sci Ctr, Int Sci Ctr Res Organism Extreme Condit, Krasnoyarsk 660036, Russia
[Balasoiu, M.] Joint Inst Nucl Res, Dubna 141980, Moscow Oblast, Russia
ИФ СО РАН
Institute of Continuum Media Mechanics, Ural Division, Russian Academy of Sciences, ul. Akademika Koroleva 1, Perm 614013, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Akademgorodok 50, Krasnoyarsk 660036, Russian Federation
Siberian Federal University, pr. Svobody 79, Krasnoyarsk 660041, Russian Federation
International Scientific Center for Research of Organism under Extreme Conditions, Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk 660036, Russian Federation
Joint Institute for Nuclear Research, ul. Joliot-Curie 6, Dubna, Moscow oblast 141980, Russian Federation

Доп.точки доступа:
Raikher, Y. L.; Stepanov, V. I.; Stolyar, S. V.; Столяр, Сергей Викторович; Ladygina, V. P.; Balaev, D. A.; Балаев, Дмитрий Александрович; Ishchenko, L. A.; Balasoiu, M.
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Application of Raman spectroscopy for identification of rinneite (K3NaFeCl6) in inclusions in minerals / S. Grishina, P. Kodera, S. Goryainov [et al.] // J. Raman Spectrosc. - 2020. - Vol. 51, Is. 12. - P. 2505-2516, DOI 10.1002/jrs.6005. - Cited References: 55. - Russian Foundation for Basic Research, Grant/Award Numbers: 18-05-00682, 18-05-00682; European Regional Development Fund, Grant/Award Number: ITMS 26240220086; Vedecka Grantova Agentura MSVVaS SR a SAV, Grant/Award Number: 1/0313/20 . - ISSN 0377-0486. - ISSN 1097-4555

РУБ Spectroscopy
Рубрики:
SALT MELT
   IRON
   DEPOSIT
   FLUIDS
   TRANSFORMATIONS
   FERRIHYDRITE
Кл.слова (ненормированные):
daughter mineral -- Fe-oxyhydroxides -- fluid inclusion -- rinneite -- weathering
Аннотация: Solid daughter phases in fluid and salt melt inclusions in minerals provide important clues to characterization of mineral‐forming processes. The analysis of the fluid inclusions often requires the exposure of the daughter minerals. Rinneite (K3NaFeCl6), which is a hygroscopic mineral, decomposes in air and cannot thus be identified by conventional methods. A combined approach has been applied for investigation of synthetic and natural rinneite to acquire its diagnostic Raman spectrum for a nondestructive identification. We used natural rinneite inclusions in halite, suitable for applying a complex of methods, to clear up the reference spectrum. Improved high‐resolution X‐ray diffraction (XRD) data obtained from natural rinneite inclusion are comparable with that of previously published, with similar unit cell dimensions. Polarized Raman spectra of natural inclusions were obtained using different geometries and polarization of the incident and scattered light. Interpretation of experimental Raman spectra was performed within the framework of lattice dynamics simulations and group analysis. Individual spectral bands are interpreted in terms of Raman‐active vibrational modes of K3NaFeCl6 structural units. Raman spectrum of synthetic rinneite with main peaks at 75, 91, 103, 143, 167, 171, 187, and 239 cm−1 agrees well with the spectra of rinneite inclusions in halite from the Nepa potash deposit and rinneite daughter minerals in salt melt inclusions hosted by quartz veinlets from the porphyry gold systems in the Central Slovakia Volcanic Field. This provides a firm basis for any future identification of this mineral worldwide, using nondestructive Raman spectroscopy.

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Держатели документа:
Russian Acad Sci, Sobolev Inst Geol & Mineral, Dept Mineral, Siberian Branch, Novosibirsk, Russia.
Comenius Univ, Dept Econ Geol, Fac Nat Sci, Bratislava, Slovakia.
Kirensky Inst Phys, Mol Spect Lab, Krasnoyarsk, Russia.
Siberian Fed Univ, Inst Engn Phys & Radio Elect, Krasnoyarsk, Russia.
Novosibirsk State Univ, Dept Geol, Novosibirsk, Russia.
Slovak Acad Sci, Inst Inorgan Chem, Bratislava, Slovakia.
Russian Acad Sci, Inst Geol Ore Deposits Petrog Mineral & Geochem, Moscow, Russia.

Доп.точки доступа:
Grishina, Svetlana; Kodera, Peter; Goryainov, Sergey; Oreshonkov, A. S.; Орешонков, Александр Сергеевич; Seryotkin, Yurii; Simko, Frantisek; Polozov, Alexander G.; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [18-05-00682]; European Regional Development FundEuropean Union (EU) [ITMS 26240220086]; Vedecka Grantova Agentura MSVVaS SR a SAV [1/0313/20]
}
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