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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V.
Заглавие : Architecture and properties of perovskite-like crystals
Коллективы : USA-CIS-Baltic Seminar on Ferroelectricity
Место публикации : Ferroelectrics: Gordon Breach Sci Publ Ltd, 1999. - Vol. 226, Is. 1-4. - P.1-9. - ISSN 0015-0193, DOI 10.1080/00150199908230285
Примечания : Cited References: 9
Ключевые слова (''Своб.индексиров.''): perovskites--perovskite-like crystals--new representatives of ruddlesden-popper's phases--new representatives of ruddlesden-popper's phases--perovskite-like crystals--perovskites
Аннотация: A variety of the known structures of perovskite-like crystals including cation- and anion-deficient phases were considered as the intergrowth systems of slabs containing n-layers (n = 1,2, 3,...infinity) of corner-linked octahedra BX6, pyramids EX5 or square-planar nets BX4 (B-cation, X- anion) linked by intermediate blocks of different types.([1- 3]) Some new structural types and new representatives of ferroelectrics, ferroelastics and HTSC's can be constructed on this basis. The prognosis of new possible representatives in Ruddlesden-Popper's family is discussed.A variety of the known structures of perovskite-like crystals including cation- and anion-deficient phases were considered as the intergrowth systems of slabs containing n-layers (n = 1, 2, 3, . . . ?) of corner-linked octahedra BX6, pyramids BX5 or square-planar nets BX4 (B-cation, X-anion) linked by intermediate blocks of different types.[1-3] Some new structural types and new representatives of ferroelectrics, ferroelastics and HTSC's can be constructed on this basis. The prognosis of new possible representatives in Ruddlesden-Popper's family is discussed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V.
Заглавие : Architecture of perovskite-like crystals
Место публикации : Crystallogr. Rep. - 1997. - Vol. 42, Is. 4. - P.556-566. - ISSN 1063-7745
Аннотация: The structures of the well-known perovskite-like crystals, including stoichiometric and both cation- and anion-dencient compounds, are considered as intergrowth systems of stacks consisting either of n layers (n = 1 - ?) connected via the vertices of the BX6 octahedra or of combinations of layers of octahedra, BX5 pyramids, and planar networks of BX4 squares with intermediate block layers of various types. The classification of stacks and block layers in these structures is suggested. Based on this classification, the known structure types are considered and new structure types, including various possible superconductor structures, are predicted.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V.
Заглавие : Architecture of perovskite-like ferroelectrics and HT-supercoductors
Коллективы : International Meeting on Ferroelectricity
Место публикации : J. Korean Phys. Soc. - 1998. - Vol. 32: Suppl. - P.S1790-S1792. - ISSN 0374-4884
Примечания : Cited References: 7
Аннотация: Structures of the known perovskite-like crystals are considered as the systems of slabs containing n layers (n = 1, 2,..., infinity) vertices-linked octahedra BX6, pyramids BX5 or planar square nets BX4 (B - cation, X - anion) intergrowing with blocks of different types. Using these fragments whole variety of stoichiometric, cation-and anion-deficient structures can be constructed and many new perovskite-like layered crystals including ferroelectrics, ferroelastics and HTSC's may be found.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Reshchikova L. M., Beznosikov B. V.
Заглавие : Behaviour of the elastic constants of KMnF3 single crystals near the transition of puckering
Место публикации : Phys. Status Solidi. - 1966. - Vol. 17, Is. 1. - P.K17-K20. - ISSN 0370-1972, DOI 10.1002/pssb.19660180149
Примечания : Cited References: 7
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V.
Заглавие : Crystal chemistry and prediction of compounds with a structure of skutterudite type
Место публикации : Crystallogr. Rep. - 2007. - Vol. 52, Is. 1. - P.28-36. - ISSN 1063-7745, DOI 10.1134/S106377450701004X
Примечания : Cited References: 47
Предметные рубрики: SUPERCONDUCTOR PROS4SB12
MAGNETIC-PROPERTIES
HIGH-PRESSURE
RARE-EARTH
TRANSITION
LAFE4P12
Аннотация: Crystallochemical analysis of skutterudite-type structures in the BX3, AB(4)X(12), and A B-3' B4O12 compositions (A and B are metals; X = P, As, Sb) has been performed. Probable regions of structure formation are determined, thereby indicating that more than 270 new compounds of the AB4X12 composition can be synthesized.(1)
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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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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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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V., Posdnjakova L. A.
Заглавие : Successive phase transitions in perovskites. II. Structures of distorted phases
Коллективы : European meeting on ferroelectricity
Место публикации : Ferroelectrics. - 1976. - Vol. 12, Spesial issue. - P.197-198. - DOI 10.1080/00150197608241424
Аннотация: Estimation of atomic displacements from the unit cell distortions is discussed for the perovskites having successive structural phase transitions. The distorted structures of CsPbCl3 and CsSrCl3 are proposed.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V., Misyul S. V.
Заглавие : Successive phase-transitions in crystals of K2MGF4-type structure
Место публикации : Phys. Status Solidi A. - 1987. - Vol. 104, Is. 2. - P.529-543. - ISSN 0031-8965, DOI 10.1002/pssa.2211040204
Примечания : Cited References: 66
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10.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Aleksandrov K. S., Beznosikov B. V., Misyul S. V.
Заглавие : Successive structural phase-transitions in layered crystals. 1. TlAlF4 type crystals
Место публикации : Ferroelectrics. - 1987. - Vol. 73, Is. 1. - P.201-220. - ISSN 0015-0193, DOI 10.1080/00150198708227918
Примечания : Cited References: 50
Аннотация: Rotational distortions due to octahedral tilts and possible ways of successive phase transitions are considered in crystals of TIAIF4-type structure. Crystallographical and group-theoretical analysis of possible transitions from the initial space group D14h was performed. It is shown that in some crystals of the studied type there exist the examples of distortional polytypism, i.e., different types of octahedral tilts in the neighbour layers which have been equivalent in the initial phase.
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11.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Crystal chemistry and structure of expected compounds A2BX4. II. Oxides, selenides, and sulfides 061A2B6+X4 2- and 080A2 2+B4+X4 2-.
Место публикации : Sov. Phys.: Crystallogr. - 1985. - Vol. 30, Is. 5. - P.533-535; \b Crystallography Reports; \b Kristallografiya
Аннотация: Predictions of A2BX4 compounds for compositions 071A2 +B6+X4 2- with type structures of K2MgF4, beta -K2SO4, spinel, olivine, thenardite, phenacite, Sr2PbO4, and Pb3O4 are presented. K2MgF4 type structures are known and probable only in oxides and sulphides with hexavalent uranium because their formation is limited by the size of the hexavalent B cation. Structures of the beta -K2SO4 type are stable in compounds with large A cations. Among the sulphides with 076A2 +B6+X4 2-, the spinel crystal structure is as yet unknown, but is most probable in compounds with A+ = Li, Na, Ag, and with B6+ = Mo, W, and U. The olivine type structure is known only in Ag2CrO4, and no new compounds with this structure are expected to be found. A phenacite structure is probable only in three new oxides and in some sulphides with Li as A+. A thenardite type structure is probable in oxides with B6+ = Fe and Mn, but sulphides are unlikely. For 076A2 2+B4+X4 2- compounds with large A2+ ions and B4+ ions with radii from 0.57 A to RB 0.48RA + 0.11, a K2MgF4 structure would exist. For even larger A ions, the Sr2PbO4 structure would exist. In oxides with cations A2+ = Pb and Sn, compounds with Pb3O4 type structures are probable.-D.F.P.
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12.

13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Crystal-chemistry and expected structures of A2BX4 compounds. I. Halogenides
Место публикации : Sov. Phys.: Crystallogr. - 1985. - Vol. 30, Is. 3. - P.509-512; \b Crystallography Reports; \b Kristallografiya
Примечания : Cited References: 12
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Anistratov A. T., Aleksandrov K. S.
Заглавие : Crystal-chemistry, phase-transitions, and physical-properties of halide crystals with perovskite-like structure
Место публикации : Inorg. Mater. - 1982. - Vol. 18, Is. 10. - P.1406-1411. - ISSN 0020-1685
Примечания : Cited References: 13
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Layer perovskite-like crystals with CsCl-type blocks
Место публикации : Crystallogr. Rep.: MAIK Nauka-Interperiodica / Springer, 2001. - Vol. 46, Is. 2. - P.246-252. - ISSN 1063-7745, DOI 10.1134/1.1358402
Примечания : Cited References: 17
Аннотация: The crystal chemistry of layer perovskite-like structures with CsCl-type blocks have been analyzed. Some characteristic features of their formation are described and new praphases are derived, possible oxyhalides and oxides are indicated. (C) 2001 MAIK "Nauka/Interperiodica".
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Layered perovskite-like crystals with (Al+Cl) stacks in the structure
Место публикации : J. Struct. Chem. - 2000. - Vol. 41, Is. 6. - P.1004-1008. - ISSN 0022-4766, DOI 10.1023/A:1010363124148
Примечания : Cited References: 16
Предметные рубрики: CUPRATE
DESIGN
Аннотация: Crystal-chemical analysis has been performed on layered perovskite-like structures with (Al+Cl) binary stacks, which are combinations of anionic octahedra with halves of degenerate octahedra (semioctahedra). Crystal data are reported for 56 possible prephases, of which 54 are new ones. Recommendations for syntheses of new compounds are given.
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17.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Perovskite-like crystals of the Ruddlesden-Popper series
Место публикации : Crystallogr. Rep.: MAIK Nauka-Interperiodica / Springer, 2000. - Vol. 45, Is. 5. - P.792-798. - ISSN 1063-7745, DOI 10.1134/1.1312923
Примечания : Cited References: 28
Предметные рубрики: CUPRATE
OXIDES
Аннотация: The layer perovskite-like structures of the so-called Ruddlesden-Popper phases have been analyzed in terms of crystal chemistry. The geometrical boundaries of the existence ranges of these compounds with multilayer stacks are determined and new phases of this type are predicted. The possible variants of related structures are also considered. (C) 2000 MAIK "Nauka/Interperiodica".
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Perovskite-like crystals of the Ruddlesden-Popper series
Место публикации : Kristallogr. - 2000. - Vol. 45, Is. 5. - P.864-870. - ISSN 0023-4761; Crystallogr. Rep.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Prediction of compounds related to InFeZn2O5
Место публикации : J. Struct. Chem. - 2008. - Vol. 49, Is. 1. - P.42-46. - ISSN 0022-4766, DOI 10.1007/s10947-008-0006-7
Примечания : Cited References: 17
Предметные рубрики: DIELECTRIC-DISPERSION
ERFE2O4
LUFE2O4
Ключевые слова (''Своб.индексиров.''): crystal--hexagonal layered structures--prediction of compounds
Аннотация: The results of crystal-chemical analysis of layered hexagonal structures related to InFeZn2O5 and having space group P6(3)/mmc are reported. It was found that more than 250 new compounds could be synthesized. Multilayered compounds of other compositions are possible.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Beznosikov B. V., Aleksandrov K. S.
Заглавие : Prediction of pra-phases of layered perovskite-like structures with cation vacancies
Место публикации : J. Struct. Chem. - 2002. - Vol. 43, Is. 1. - P.172-175. - ISSN 0022-4766, DOI 10.1023/A:1016098521933
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