New oxidation states and defect chemistry in the pyrochlore structure

被引：52

作者：

Blundred, GD ^{[1
]}

Bridges, CA ^{[1
]}

Rosseinsky, MJ ^{[1
]}

机构：

[1] Univ Liverpool, Dept Chem, Liverpool, Merseyside, England

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2004年 / 43卷 / 27期

关键词：

lanthanides; magnetic properties; pyrochlore phases; reduction; titanium;

D O I：

10.1002/anie.200453819

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Titanium(III) pyrochlores with TiIII centers at up to 90% of the B sites of the A2B2O6O′ pyrochlore structure (see picture; blue: BO6, green: A, red: O′), which is well-known for supporting high oxidation states at the octahedral B sites, were obtained by the low-temperature reduction of lanthanide pyrochlores Ln 2Ti2O7 with CaH2. This leads to significant rearrangement of the anion sublattice and introduces antisite disorder between the two distinct cation arrays.

引用

页码：3562 / 3565

页数：4

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