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

页码：13824 / 13826

页数：3

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