AgCu3V4O12: a Novel Perovskite Containing Mixed-Valence Silver ions

被引：7
|
作者：
Akizuki, Yasuhide [1 ]
Yamada, Ikuya [2 ,3 ]
Fujita, Koji [1 ]
Akamatsu, Hirofumi [4 ,5 ]
Irifune, Tetsuo [6 ]
Tanaka, Katsuhisa [1 ]
机构：
[1] Kyoto Univ, Grad Sch Engn, Dept Mat Chem, Nishikyo Ku, Kyoto 6158510, Japan
[2] Osaka Prefecture Univ, Nanosci & Nanotechnol Res Ctr, Naka Ku, Sakai, Osaka 5998531, Japan
[3] JST PRESTO, Kawaguchi, Saitama 3320012, Japan
[4] Penn State Univ, Mat Res Inst, University Pk, PA 16802 USA
[5] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA
[6] Ehime Univ, Geodynam Res Ctr, Matsuyama, Ehime 7908577, Japan
来源：
INORGANIC CHEMISTRY | 2013年 / 52卷 / 24期
关键词：
CRYSTAL-STRUCTURE; X-RAY; NEUTRON-DIFFRACTION; AGCUO2; NACUO2;
D O I：
10.1021/ic402579v
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A novel silver-containing perovskite, Ag-Cu3V4O12, was synthesized under high-pressure and high-temperature conditions. It crystallizes in an A-site-ordered perovskite structure (space group Im (3) over bar), in which silver ions occupy the 12-coordinated A sites forming regular icosahedra, and exhibits metallic behavior. Bond-valencesum calculations and X-ray photoemission spectroscopy reveal that Ag ions are present in the mixed-valence state, most likely attributable to the coexistence of Ag+ and Ag3+, unlike the case of well-known perovskite-type AgNbO3 and AgTaO3 containing only Ag+ ions. We discuss metallic conduction in relation to electronic structure calculations.
引用
收藏
页码：13824 / 13826
页数：3
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