Issue 28, 2015

Distribution of Al atoms in the clathrate-I phase Ba8AlxSi46−x at x = 6.9

Abstract

The clathrate-I phase Ba8AlxSi46−x has been structurally characterized at the composition x = 6.9 (space group Pm[3 with combining macron]n, no. 223, a = 10.4645(2) Å). A crystal structure model comprising the distribution of aluminium and silicon atoms in the clathrate framework was established: 5.7 Al atoms and 0.3 Si atoms occupy the crystallographic site 6c, while 1.2 Al atoms and 22.8 Si atoms occupy site 24k. The atomic distribution was established based on a combination of 27Al and 29Si NMR experiments, X-ray single-crystal diffraction and wavelength-dispersive X-ray spectroscopy.

Graphical abstract: Distribution of Al atoms in the clathrate-I phase Ba8AlxSi46−x at x = 6.9

Supplementary files

Article information

Article type
Paper
Submitted
26 Mar 2015
Accepted
28 May 2015
First published
18 Jun 2015

Dalton Trans., 2015,44, 12680-12687

Distribution of Al atoms in the clathrate-I phase Ba8AlxSi46−x at x = 6.9

M. Bobnar, B. Böhme, M. Wedel, U. Burkhardt, A. Ormeci, Y. Prots, C. Drathen, Y. Liang, H. D. Nguyen, M. Baitinger and Y. Grin, Dalton Trans., 2015, 44, 12680 DOI: 10.1039/C5DT01198A

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