Interstitial Oxide Ion Order and Conductivity in La₁.₆₄Ca₀.₃₆Ga₃O₇.₃₂ Melilite

The spatial ordering of interstitial oxide charge carriers in La1.64Ca0.36Ga3O7.32 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 GaO5 tri...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2010-03, Vol.49 (13), p.2362-2366
Main Authors: Li, Man-Rong, Kuang, Xiaojun, Chong, Samantha Y, Xu, Zhongling, Thomas, Christopher I, Niu, Hongjun, Claridge, John B, Rosseinsky, Matthew J
Format: Article
Language:English
Subjects:
Communications
defect structures
ion conductivity
oxido ligands
solid-state structures
Online Access:Get full text
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Summary:The spatial ordering of interstitial oxide charge carriers in La1.64Ca0.36Ga3O7.32 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 GaO5 trigonal bipyramids from GaO4 tetrahedra (see picture; brown, orange, and teal are Ga, all others O) in disordered structures at low interstitial concentrations.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200906220