CAM2(PO4)2(HPO4) (M=FE OR V) - PHOSPHATES CONTAINING DIMERS OF EDGE-SHARING MO6 OCTAHEDRA

被引：13
|
作者：
LII, KH
机构：
来源：
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1994年 / 06期
关键词：
D O I：
10.1039/dt9940000931
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two new phosphates, CaM2(PO4)2(HPO4) (M = Fe(III) or V(III)), have been synthesised hydrothermally at 400-degrees-C and characterized by single-crystal X-ray diffraction. Crystal data: CaFe2(PO4)2(HPO4), monoclinic, space group P2(1)/n, a = 6.3663(6), b = 19.752(2), e = 6.5030(8) angstrom, beta = 91.626(9)-degrees, Z = 4 and R = 0.0240; CaV2(PO4)2(HPO4), as above except a = 6.359(2), b = 19.973(2), c = 6.4744(4) angstrom, beta = 91.51 (1)-degrees and R = 0.0390. The two compounds are isostructural. The framework consists of corner-sharing PO4 tetrahedra, HPO4 groups and dimers of edge-sharing MO6 octahedra forming M2O10 units. The structure of CaFe2(PO4)2(HPO4) was further defined by thermogravimetric and Mossbauer studies.
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页码：931 / 935
页数：5
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