A TEM STUDY OF THE ORDERING OF EXCESS INTERSTITIAL OXYGEN-ATOMS IN LN2NIO4+DELTA(LN = LA, ND)

被引：22

作者：

OTERODIAZ, LC ^{[1
]}

LANDA, AR ^{[1
]}

FERNANDEZ, F ^{[1
]}

SAEZPUCHE, R ^{[1
]}

WITHERS, R ^{[1
]}

HYDE, BG ^{[1
]}

机构：

[1] AUSTRALIAN NATL UNIV,SCH CHEM,CANBERRA,ACT 2601,AUSTRALIA

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 1992年 / 97卷 / 02期

关键词：

D O I：

10.1016/0022-4596(92)90054-Y

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A Transmission Electron Microscope (TEM) study of the oxygen excess Ln2NiO4+δ(Ln = La, Nd) compounds shows long range ordering of interstitial oxygen, characterized by weak superlattice reflections whose modulation wave-vector can be both commensurate as well as incommensurate with respect to the reciprocal lattice of the basic K2NiF4 structure type for both oxides. The excess interstitial oxygen atoms are sometimes found to be rather mobile and susceptible to electron beam irradiation, although less so in the case of the Nd compound. A new type of superstructure has been found in the Nd case, and a model for the oxygen interstitial ordering is given. © 1992.

引用

页码：443 / 451

页数：9

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