Crystal growth and structure of V2VSe2IVO9;: comparison with V2Te2O9

被引：12
|
作者：
Millet, P
Galy, J
Johnsson, M
机构：
[1] CNRS, Ctr Elaborat Materiaux & Etudes Struct, F-31055 Toulouse 4, France
[2] Univ Stockholm, Dept Inorgan Chem, S-10691 Stockholm, Sweden
来源：
SOLID STATE SCIENCES | 1999年 / 1卷 / 05期
关键词：
D O I：
10.1016/S1293-2558(00)80082-5
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
High quality single crystals of V2Se2O9 have been obtained as a side compound during a study of the CuCl2-V2O5-SeO2 system. V2Se2O9 crystallises in the monoclinic system, space group P2(1)/n with a = 8.0560(2), b = 10.3650(2), c = 8.4500(2) Angstrom, beta = 102.893(2)degrees, Z = 4 and, rho(x) = 3.90 g/cm(3). Full matrix least-squares refinement gave an R = 0.0347 and R-w = 0.0802 using 2232 independent reflections. The structure is built up by very distorted octahedra occupied by V5+ sharing one edge and one apex to form [V4O18](16-). entities interconnected by SeO3E tetrahedra (E designs the 4s(2) lone pair of the Se (IV) cation). V2Se2O9 is not isostructural with V2Te2O9, in which the V5+O6 octahedra share edges to form along [011] infinite chains linked together via Te2O5E2 groups.
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页码：279 / 286
页数：8
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