Temperature-induced barium de-trapping from a double-well potential in Ba6Ge25

The crystal structure of barium-germanium clathrate Ba6Ge25 was studied using neutron powder diffraction in the temperature range 20-300K. The compound was found to be cubic (S.G. P4_1 23) in the entire temperature range. However, the fully-ordered model of the crystal structure (no split sites) is...

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Bibliographic Details
Main Authors: Schmidt, M, Radaelli, P, Gutmann, M, Billinge, S, Hur, N, Cheong, S
Format: Journal article
Language:English
Published: 2003