Magnetic susceptibility and crystal structure of the new oxovanadium phosphate (NH4)Zn(H2O)(VO)2(PO4)2(H2PO4)

被引：0
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作者：
Le Fur, E
Peña, O
Pivan, JY
机构：
[1] CNRS, UMR 6511, Chim Solide & Inorgan Mol Lab, F-35700 Rennes, France
[2] Ecole Natl Super Chim Rennes, Inst Chim, Lab Physicochim, UPRES 1795, F-35700 Rennes, France
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2002年 / 12卷 / 01期
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中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Intense blue powder samples of (NH4)Zn(H2O)(VO)(2)(PO4)(2)(H2PO4) were prepared in quantitative yield from hydrothermal treatments. (NH4)Zn(H2O)(VO)(2)(PO4)(2)(H2PO4) is monoclinic, space group P2(1)/n with parameters a = 10.7451(1)Angstrom, b = 9.1941(1)Angstrom, c = 13.2112(2)Angstrom, beta = 103.657(1)degrees, Z = 4 (R-1(F-o) = 0.030, wR(2)(F-o(2)) = 0.047). The structure is based on linking of fused octahedra V2O9 with tetrahedra HxPO4 and ZnO3(H2O). The remaining tunnels of the 3D framework [Zn(H2O)(VO)(2)(PO4)(2)(H2PO4)](-) are occupied by the ammonium cations. The susceptibility data are consistent with the presence of dimers containing V4+ and small amounts of nonmagnetic V5+ with strong antiferromagnetic coupling (J similar to 29 cm(-1)).
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页码：132 / 136
页数：5
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