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Interstitial Oxide Ion Order and Conductivity in La 1.64 Ca 0.36 Ga 3 O 7.32 Melilite
Author(s) -
Li ManRong,
Kuang Xiaojun,
Chong Samantha Y.,
Xu Zhongling,
Thomas Christopher I.,
Niu Hongjun,
Claridge John B.,
Rosseinsky Matthew J.
Publication year - 2010
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200906220
Subject(s) - melilite , oxide , conductivity , ion , fast ion conductor , materials science , charge carrier , chemistry , chemical physics , electrolyte , crystallography , metallurgy , organic chemistry , spinel , optoelectronics , electrode
The spatial ordering of interstitial oxide charge carriers in La 1.64 Ca 0.36 Ga 3 O 7.32 melilite reduces the ion conductivity. The complex ordering pattern is produced by the accommodation of local structural relaxation around the interstitial oxides, which extends beyond the simple formation of GaO 5 trigonal bipyramids from GaO 4 tetrahedra (see picture; brown, orange, and teal are Ga, all others O) in disordered structures at low interstitial concentrations.