EFFECT OF COBALT SUBSTITUTION ON THE JAHN-TELLER DISTORTION OF THE NANIO2 LAYERED OXIDE

被引：17

作者：

DELMAS, C ^{[1
]}

SAADOUNE, I ^{[1
]}

DORDOR, P ^{[1
]}

机构：

[1] UNIV BORDEAUX 1,ECOLE NATL SUPER CHIM & PHYS BORDEAUX,F-33405 TALENCE,FRANCE

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1994年 / 244卷

关键词：

D O I：

10.1080/10587259408050127

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

NaNiO2 exhibits a layered structure made of NiO2 slabs between which Na+ ions are inserted in octahedral environment. Trivalent nickel ions in the low spin state (t(2)(6)e(1)) exhibits a Jahn-Teller effect which leads to a distortion of the NiO6 and hence to a macroscopic lattice distortion. The partial substitution of trivalent cobalt for nickel (NaNi1-yCoyO2) allows to suppress the structural distortion for y greater than or equal to 0.22. This behavior results from the competition between the stabilization of Ni3+ ions in distorted environment and the strong stabilization of the isotropic Co3+ ions in octahedral environment.

引用

页码：337 / 342

页数：6

共 14 条

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