Journal
SOLID STATE IONICS
Volume 177, Issue 19-25, Pages 1691-1695Publisher
ELSEVIER
DOI: 10.1016/j.ssi.2006.06.026
Keywords
superionic phase transition; lithium ion conductor; Li-7 NMR; In-115 NMR; defect spinel
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Li3InBr6 undergoes a phase transition to a superionic phase at 314 K associated with a steep increase of the conductivity (sigma = 4 x 10(-3) Scm(-1) at 330 K). This superionic phase is isomorphous with Li3InCl6 in which a positional disorder at the In3+ site is introduced. A pseudo cubic-close-packing of the bromide ions is formed in this phase. On the other hand, a new superionic phase of LiInBr4 was found above ca 315 K and its 7 structure was confirmed to be a defect spinet. The dynamic properties of the cations in these two superionic phases were investigated by Li-7 and In-115 NMR spectroscopy. (c) 2006 Published by Elsevier B.V.
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