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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Александров, Кирилл Сергеевич, Заславский, Георгий Моисеевич
Заглавие :
Место публикации : Новые книги за рубежом. - 1974. - Серия А, № 5. - С. 76-79
Аннотация: It is a 20-volume series. Volume 4 was never published, volumes 7-20 were edited by Domb and Joel Lebowitz. В этом томе: 'Thermodynamics' M.J. Buckingham. 'Equilibrium Scaling in Fluids and Magnets', by M. Vicentini-Missoni. 'Surface Tension of Fluids', by B. Widom. 'Surface and Size Effects in Lattice Models', by P.G. Watson. 'Exact Calculations on a Random Ising Systems', by B. McCoy. 'Percolation and Cluster Size', by J.W. Essam. 'Melting and Statistical Geometry of Simple Liquids', by R. Collins. 'Lattice Gas Theories of Melting', by L.K. Runnels. 'Closed Form Approximations for Lattice Systems', by D.M. Burley. 'Critical Properties of the Spherical Model', by G.S. Joyce. 'Kinetics of Ising Models', by K. Kawasaki.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Александров, Кирилл Сергеевич, Зиненко, Виктор Иванович
Заглавие :
Место публикации : Новые книги за рубежом. - 1974. - Серия А, № 2. - С. 67-71
Аннотация: It is a 20-volume series. Volume 4 was never published, volumes 7-20 were edited by Domb and Joel Lebowitz. В этом томе: Introductory Note on Phase Transitions and Critical Phenomena, by C.N. Yang. Rigorous Results and Theorems, by R.B. Griffiths. Dilute Quantum Systems, by J. Ginibre. The C*-Algebraic Approach to Phase Transitions, by G.G. Emch. One-dimensional Models - Short Range Forces, by C.J. Thompson. Two-dimensional Ising Models, by H.N.V. Temperley. Transformation of Ising Models, by I. Syozi. Two-dimensional Ferroelectric Models, by E.H. Lieb and Fa Yueh Wu.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Александров, Кирилл Сергеевич, Заславский, Георгий Моисеевич
Заглавие :
Место публикации : Новые книги за рубежом. - 1977. - Серия А, № 7. - С. 55-58
Примечания : РЖ Физика, реф. 4Е540 (1978)
Аннотация: It is a 20-volume series. Volume 4 was never published, volumes 7-20 were edited by Domb and Joel Lebowitz. В этом томе: Scaling, Universality and Operator Algebras, by L.P. Kadanoff. Generalized Landau Theories, by M. Luban. Neutron Scattering and Spatial Correlation near the Critical Point, by J. Als-Nielsen. Mode Coupling and Critical Dynamics, by K. Kawasaki.
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Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Александров, Кирилл Сергеевич, Заславский, Георгий Моисеевич
Заглавие :
Место публикации : Новые книги за рубежом. - 1977. - Серия А, № 7. - С. 55-58
Примечания : РЖ Физика, реф. 4Е540 (1978)
Аннотация: It is a 20-volume series. Volume 4 was never published, volumes 7-20 were edited by Domb and Joel Lebowitz. В этом томе: 'Monte Carlo Investigations of Phase Transitions and Critical Phenomena', by K. Binder. 'System with Weak Long-Range Potentials', by P.C. Hemmer and J.L. Lebowitz. 'Correlation Functions and their Generating Functionals: General Relations with Applications to the Theory of Fluids', by G. Stell. 'Heisenberg Ferromagnet in the Green's Function Approximation', by R.A. Tahir-Kheli. 'Thermal Measurements and Critical Phenomena in Liquids', by A.V. Voronel.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pogoreltsev E. I., Bogdanov E. V., Melnikova S.V., Flerov I. N., Laptash N. M.
Заглавие : (NH4)3HfF7: Crystallooptical and calorimetric studies of a number of successive phase transitions
Место публикации : J. Fluor. Chem.: Elsevier, 2017. - Vol. 204. - P.45-49. - ISSN 00221139 (ISSN), DOI 10.1016/j.jfluchem.2017.10.004
Примечания : Cited References: 14
Аннотация: Single crystals of (NH4)3HfF7 were grown. Polarising optical observations as well as measurement of the heat capacity and birefringence Δn(Т) were performed in the temperature range of 200–310 K. Reversible phase transitions at temperatures T0 = 290 K, Т1 = 280.5 K, Т2 ≈ 273 K, Т3 = 266 K, Т4 = 259 K, Т5 = 231 K, Т6 = 229 K were found. Observations in polarised light make it possible to suggest a sequence of changes in the symmetry groups for these transitions: Fm3m ⟵Т0→ cub. ⟵Т1→ mmm (1) ⟵Т2→ mmm (2) ⟵Т3→ mmm (3) ⟵Т5→ 2/c. The T-p phase diagram was studied and the temperature boundaries of the stability of the distorted crystalline phases were determined. A significant change of the entropy at successive phase transitions ΣΔS = 10.6 J/mol K indicates a disordering of the initial cubic phase.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Boehm M., Roessli B., Schefer J., Ouladdiaf B., Amato A., Baines C., Staub U., Petrakovskii G. A.
Заглавие : A neutron scattering and mu SR investigation of the magnetic phase transitions of CuB2O4
Место публикации : Physica B: ELSEVIER SCIENCE BV, 2002. - Vol. 318: 6th Patras-University Euroconference on Properties of Condensed Matter Probed with X-Ray Scattering-Electron Correlations and Magnetism (SEP 21-25, 2001, PATRAS, GREECE), Is. 4. - P277-281. - ISSN 0921-4526, DOI 10.1016/S0921-4526(02)00788-3
Примечания : Cited References: 8
Предметные рубрики: COPPER METABORATE
Ключевые слова (''Своб.индексиров.''): magnetic soliton lattice--dzyaloshinskii-moriya interaction--neutron diffraction--mu sr
Аннотация: We have investigated the magnetic ground state in CuB2O4, copper metaborate, by means of neutron diffraction and muSR measurements. At T-N = 21 K CuB2O4 undergoes a second-order phase transition from a paramagnetic to an antiferromagnetic commensurate state followed by a second transition at T* = 10 K where the two magnetic sublattices form a soliton lattice, as reported earlier. We give a detailed analysis of the magnetic structure in the commensurate phase which is found to be different from the one published recently. New experimental results are presented which show the existence of a third transition below T approximate to 1.8 K. The magnetic structure remains incommensurate at very low temperatures, but a re-distribution of the magnetic intensities is observed in the neutron diffraction data set which suggests that the phases between the Cu2+ spins are changed. (C) 2002 Elsevier Science B.V. All rights reserved.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Mel'nikova S. V., Molokeev M. S., Laptash N. M., Misyul S. V.
Заглавие : A non-typical sequence of phase transitions in (NH4)3GeF7: optical and structural characterization
Коллективы : RFBR [15-02-02009 a]
Место публикации : Dalton Trans.: Royal Society of Chemistry, 2016. - Vol. 45, Is. 12. - P.5321-5327. - ISSN 1477-9226, DOI 10.1039/c5dt04907e. - ISSN 1477-9234(eISSN)
Примечания : Cited References:25. - The reported study was partially supported by RFBR, research project no. 15-02-02009 a
Предметные рубрики: Crystal-structure
Powder diffraction
NH4F
Fluorination
Аннотация: Single crystals of germanium double salt (NH4)3GeF7 = (NH4)2GeF6·NH4F = (NH4)3[GeF6]F were grown and studied by the methods of polarization optics and X-ray diffraction. The birefringence Δn = (no − ne), the rotation angle of the optical indicatrix ϕ(T) and unit cell parameters were measured in the temperature range 100–400 K. Three structural phase transitions were found at the temperatures: T1↓ = 279.2 K (T1↑ = 279.4 K), T2↑ = 270 K (T2↓ = 268.9 K), T3↓ = 218 K (T3↑ = 227 K). An unusual sequence of symmetry transformations with temperature change was established: P4/mbm (Z = 2) (G1) ↔ Pbam (Z = 4) (G2) ↔ P21/c (Z = 4) (G3) ↔ Pa (Z = 8) (G4). The crystal structures of different phases were determined. The experimental data were additionally interpreted by a group-theoretical analysis of the complete condensate of order parameters taking into account the critical and noncritical atomic displacements. Strengthening of the N–H⋯F hydrogen bonds can be a driving force of the observed phase transitions.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Vtyurin A. N., Krylov A. S., Goryainov S. V., Krylova S. N., Oreshonkov A. S., Voronov V. N.
Заглавие : A raman study of hydrostatic pressure induced phase transitions in Rb2KInF6 crystals
Место публикации : Phys. Solid State: MAIK Nauka-Interperiodica / Springer, 2012. - Vol. 54, Is. 5. - P.934-936. - ISSN 1063-7834, DOI 10.1134/S1063783412050472
Примечания : Cited References: 16. - This study was supported by the Russian Foundation for Basic Research (project nos. 11-02-98002-r_sibir' and 09-02-00062), the Siberian Branch of the Russian Academy of Sciences (integration project no. 101), and the Council on Grants from the President of the Russian Federation (grant no. HSh-4645.2010.2).
Предметные рубрики: LATTICE-DYNAMICS
ELPASOLITES
SPECTRA
Аннотация: The Raman spectra of the elpasolite (Rb2KInF6) crystal have been studied in the pressure range from 0 to 5.3 GPa at a temperature of 295 K. A phase transition at a pressure of approximately 0.9 GPa has been found. An analysis of the variations in the spectral parameters has led to the conclusion that the phase transition to a distorted phase is accompanied by the doubling of the volume of the primitive cell of the initial cubic phase. Numerical calculations of the lattice dynamics in the Rb2KInF6 crystal have been performed. The numerical simulation has established that the phase transition at a pressure of 0.9 GPa is associated with condensation of the F (lg) mode. A probable high-pressure phase is the phase with space group C2/m.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gorev M. V., Flerov I. N., Tressaud A., Denu D., Zaitsev A. I., Fokina V. D.
Заглавие : A study of the phase diagrams of (NH4)(3)Ga1-xScxF6 ammonium cryolites
Разночтения заглавия :авие SCOPUS: A study of the phase diagrams of (NH4)3Ga1-xScxF6 ammonium cryolites
Место публикации : Phys. Solid State: AMER INST PHYSICS, 2002. - Vol. 44, Is. 10. - P1954-1960. - ISSN 1063-7834, DOI 10.1134/1.1514787
Примечания : Cited References: 15
Предметные рубрики: TRANSITIONS
Аннотация: This paper reports on the results of analyzing p-T and x-T phase diagrams and calorimetric properties of solid solutions in (NH4)(3)Ga1 - xScxF6 cryolites with scandium concentrations x = 0.0, 0.1, 0.35, 0.4, 0.6, 0.8, and 1.0. The thermodynamic parameters of the phase transitions observed in the studied compounds are determined. The generalized phase diagram and successive structural transformations in a series of (NH4)(3)Me3+F6 ammonium cryolites are discussed. (C) 2002 MAIK "Nauka/Interperiodica".
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aksenov S. V., Kagan, M. Yu.
Заглавие : Collapse of the Fano resonance caused by the nonlocality of the majorana state
Коллективы : Presidium of the Russian Academy of SciencesRussian Academy of Sciences [32]; Russian Foundation for Basic ResearchRussian Foundation for Basic Research (RFBR) [19-02-00348, 20-32-70059, 20-02-00015]; Krasnoyarsk Science Foundation [19-42-240011]; Government of the Krasnoyarsk Territory; Council of the President of the Russian Federation for Support of Young Russian Scientists and Leading Scientific SchoolsLeading Scientific Schools Program [MK3722.2018.2]; National Research University Higher School of Economics
Место публикации : JETP Letters. - 2020. - Vol. 111, Is. 5. - P.286-292. - ISSN 0021-3640, DOI 10.1134/S0021364020050057. - ISSN 1090-6487(eISSN)
Примечания : Cited References: 37. - The work was supported by the Presidium of the Russian Academy of Sciences (Program of Basic Research no. 32 "Nanostructures: Physics, Chemistry, Biology, and Fundamentals of Technologies"), by the Russian Foundation for Basic Research (project nos. 19-02-00348, 20-32-70059, and 20-02-00015), and by the Government of the Krasnoyarsk Territory together with the Krasnoyarsk Science Foundation (project no. 19-42-240011 "Coulomb Interactions in the Problem of Majorana Modes in Low-Dimensional Systems with Nontrivial Topology"). S.V. Aksenov acknowledges the support of the Council of the President of the Russian Federation for Support of Young Russian Scientists and Leading Scientific Schools, grant no. MK3722.2018.2. M.Yu. Kagan acknowledges the support of the National Research University Higher School of Economics (program of basic research).
Предметные рубрики: BOUND-STATES
QUANTUM TRANSITIONS
TRANSMISSION
CONTINUUM
CASCADE
Аннотация: Owing to the nonlocal character of the Majorana state, the corresponding excitations are of great interest. It is demonstrated that the direct consequence of such nonlocality is the collapse of the Fano resonance manifesting itself in the conductance of an asymmetric interference device, the arms of which are connected by a one-dimensional topological superconductor. In the framework of the spinless model, it is shown that the predicted effect is associated with an increase in the multiplicity of the degeneracy of the zero-energy state of the structure arising at the critical point of the Kitaev model. Such an increase leads to the formation of a bound state in the continuum.
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11.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Aleksandrov K. S.
Заглавие : Atomic mechanisms of structural phase transitions
Коллективы : International Congress of the International Union of Crystallography
Место публикации : Acta crystallographica Section A: Foundations and Advances. - 1987. - Vol. 43: Supplement. - P.5-6
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V.
Заглавие : Hierarchies of perovskite-like crystals (Review)
Место публикации : Phys. Solid State: AMER INST PHYSICS, 1997. - Vol. 39, Is. 5. - P.695-715. - ISSN 1063-7834, DOI 10.1134/1.1130120
Примечания : Cited References: 143
Предметные рубрики: CU-O SYSTEM
HIGH-PRESSURE SYNTHESIS
SUPERCONDUCTING COPPER OXIDES
STRUCTURAL PHASE-TRANSITIONS
NEUTRON POWDER DIFFRACTION
SINGLE-CRYSTAL
X-RAY
CUPRATE SUPERCONDUCTORS
DIELECTRIC-PROPERTIES
HOMOLOGOUS SERIES
Аннотация: A system of mutual relationships (a hierarchy) is constructed between various perovskite-like crystal structures based on available structural data. All the perovskite-like structures are characterized by a common indicator of their relationship-the presence of layers, stacks, or frameworks made up of BX6 octahedra linked at their vertices (where B is a cation, X is an anion) or fragments of octahedra in the form of BX5 pyramids or BX4 squares in anion-deficient compounds. In layered structures, these stacks are joined to each other by various intermediate blocks. It is well known that one homological series of compounds is constructed by increasing the number of layers in a stack while preserving the same kind of connecting block. Crystals of various series that contain identical stacks (but different blocks of one or two types) can also be related to one another via this feature. The hierarchical system includes compounds with small distortions in their structures for various reasons. (C) 1997 American Institute of Physics.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S.
Заглавие : Mechanisms of the ferroelectric and structural phase transitions. Structural distortions in perovskites
Коллективы : International meeting on ferroelectricity
Место публикации : Ferroelectrics. - 1978. - Vol. 20, Spesial issue. - P.61-67. - DOI 10.1080/00150197808239430
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V.
Заглавие : Phase transitions in crystals related to α-K2SO4
Разночтения заглавия :: Phase-transitions in crystals RELATED to alpha-K2SO4
Место публикации : Ferroelectrics: GORDON BREACH SCI PUBL LTD, 1991. - Vol. 117, Is. 1. - P.331-345. - ISSN 0015-0193, DOI 10.1080/00150199108222426
Примечания : Cited References: 20
Аннотация: Sequences of phase transitions (PT's) related to α-K2SO4 prototype (G0) are considered as the ordered phases mainly due to orientational ordering of tetrahedral groups. Possibilities of statistical models with four and twelve states in G0 are compared. Last model allows to describe PT's from G0 to all known relative structures including K2MoO4-, Sr2GeS4- and Na2SO4III-types. PT's in CsLiCrO4, Cs2CdI4 and sequence of PT's in KLiSO4 are considered as examples.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S.
Заглавие : Phase-transitions and distortions of the structure in the family of crystals related to alpha-k2so
Место публикации : Kristallografiya. - 1993. - Vol. 38, Is. 1. - P.128-139. - ISSN 0023-4761; Crystallogr. Rep.
Примечания : Cited References: 38
Предметные рубрики: X-RAY
EXPECTED STRUCTURES
A2BX4 COMPOUNDS
TEMPERATURE
(NH4)2BEF4
CHEMISTRY
DISORDER
SYMMETRY
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Melnikova S. V., Kokov I. T.
Заглавие : Phase-transitions in CS2CDI4 from measurements of birefringence and dielectric-properties
Место публикации : Fiz. Tverd. Tela: MEZHDUNARODNAYA KNIGA, 1987. - Vol. 29, Is. 8. - P.2487-2490. - ISSN 0367-3294
Примечания : Cited References: 8
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Ivanov Y. N., Schafer A. D.
Заглавие : Spectroscopic investigation of phase transitions in CsLiMoO//4 crystals.
Коллективы : European Meeting on Ferroelectricity
Место публикации : European Meeting on Ferroelectricity (5 ; 1983 ; Sept. ; 26-30 ; Malaga, Sp). Ferroelectrics. - 1983. - Vol. 55, Is. 1. - P.671-674. - ISSN 0015-0193
Ключевые слова (''Своб.индексиров.''): crystals - structure--magnetic resonance--spectroscopy, raman--cesium lithium molybdate--phase transitions--ferroelectric materials
Аннотация: Raman and NMR spectra in cubic and two distorted phases of CsLiMoO//4 have been studied. Phase transitions in the crystal are shown to belong to order-disorder type.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Ivanov Y. N., Schafer A. D.
Заглавие : Spectroscopic investigation of phase-transitions in CsLiMoO4 crystals
Место публикации : Ferroelectrics: GORDON BREACH SCI PUBL LTD, 1984. - Vol. 55, Is. 1. - P.671-674. - ISSN 0015-0193, DOI 10.1080/00150198408015320
Примечания : Cited References: 4
Аннотация: Raman and NMR spectra in cubic and two distorted phases of CsLiMoO4 have been studied. Phase transitions in the crystal are shown to belong to order-disorder type.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S.
Заглавие : Structural aspects of phase transitions in crystals
Коллективы : European Meeting on Ferroelectricity
Место публикации : European Meeting on Ferroelectricity (5 ; 1983 ; Sept. ; 26-30 ; Malaga, Sp). Ferroelectrics. - 1983. - Vol. 53, Is. 1. - P.153-154. - ISSN 0015-0193, DOI 10.1080/00150198408245044
Ключевые слова (''Своб.индексиров.''): ferroelectric materials--lithium compounds - x-ray analysis--phase transitions--crystals
Аннотация: Modern X-ray methods obtain in a short time the complete set of structural amplitudes and solve a crystal structure at constant temperatures (or pressures) on both sides of phase transition. A review of structure investigations with the crystals having the common formula Me prime Me double prime BX//4 (Me prime , Me double prime equals Li, Na, K, Rb, Cs, NH//4 and H; BX//4**2** plus equals SO//4, SeO//4, BeF//4, ZnCl//4) is presented.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Bartolome J.
Заглавие : Structural distortions in families of perovskite-like crystals
Место публикации : Phase Transit.: TAYLOR & FRANCIS LTD, 2001. - Vol. 74, Is. 3. - P.255-335. - ISSN 0141-1594, DOI 10.1080/01411590108228754
Примечания : Cited References: 262
Предметные рубрики: LOW-TEMPERATURE PHASE
INELASTIC-NEUTRON-SCATTERING
POWDER PROFILE REFINEMENT
MII = CO
X-RAY
RAMAN-SCATTERING
ORDERED PEROVSKITE
RHOMBOHEDRAL PEROVSKITES
RB2KMIIIF6 ELPASOLITES
MAGNETIC-PROPERTIES
Ключевые слова (''Своб.индексиров.''): structural phase transitions--perovskites--perovskite-like crystals--group theoretical classification
Аннотация: The crystallographic and group theoretical analysis of the structural phase transitions in perovskite and perovskite-like crystals is reviewed. We include ABX(3) perovskites and their relative crystals of ReO3 type (G(0) = O-h(1)), elpasolites, cryolites and their relatives (G(0) = O-h(5)) layered crystals of TIAIF(4) series (G(0) = D-4h(1)), Aurivillius and Ruddlesden-Popper series (G(0) = D-4h(17)). The structures in their initial phase G(0) often contain n layers (n = 1, 2,3) of vertex linked octahedra. The distorted phases produced by one kind of tilt and by superposition of tilts in the slabs are enumerated. Most of the tilts correspond to symmetry changes, which can be associated to definite librational lattice modes irreducible representations of the G(0) group. The softening of modes associated to the PT has been found experimentally in many perovskites, elpasolites and layered crystals with n = 1. In contrast, no such soft modes have been found yet for even-layered (n = 2) crystals. Examples of successive phase transitions due to the superposition of tilts in these types of crystals have been collected.
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