Synthesis and crystallographic studies of garnet-type AgCa2Mn2V3O12 and NaPb2Mn2V3O12

被引：6

作者：

Awaka, Junji ^{[1
]}

Kijima, Norihito ^{[1
]}

Akimoto, Junji ^{[1
]}

Nagata, Shoichi ^{[2
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

[2] Muroran Inst Technol, Dept Mat Sci & Engn, Muroran, Hokkaido 0508585, Japan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 07期

基金：

日本学术振兴会;

关键词：

inorganic compounds; oxides; chemical synthesis; X-ray diffraction; crystal structure;

D O I：

10.1016/j.jpcs.2007.12.021

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

High-purity powder specimens of AgCa2Mn2V3O12 and NaPb2Mn2V3O12 have been successfully synthesized by solid-state chemical reaction. The Rietveld refinements from X-ray powder diffraction data verified that these compounds have the garnet-type structure (space group Ia (3) over bard, No. 230) with the lattice constant of a = 12.596(2) angstrom for AgCa2Mn2V3O12 and a = 12.876(2) angstrom for NaPb2Mn2V3O12. Calculation of the bond valence sum supported that Mn is divalent and V is pentavalent in these garnets. Estimation of the quadratic elongation and the bond angle variance showed that the distortions of the MnO6 octahedra and the VO4 tetrahedra are significantly suppressed. Our new results of AgCa2Mn2V3O12 and NaPb2Mn2V3O12 are compared to those of AgCa2M2V3O12 and NaPb2M2V3O12 (M = Mg, Co, Ni, Zn). (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：1740 / 1746

页数：7

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