Crystal structure of Li5B7O12.5Cl at 296 and 425 K
Abstract The structure of the boracite-type Li 5 B 7 O 12.5 Cl has been determined at two different temparatures. It has a cubic symmetry with a cell parameter of 12.136(3) A and space group F23. The rigid B 7 O 12 three-dimensional framework is similar to that of other boracites. Changes in the coordination of the B(2), B(3) and Li(1) arise from the insertion of the additional O(3) atom and the ordering of Li(2). On the basis of the results relative to the temperature factors and electron density of the Li(1) atom at different temperatures a transport mechanism is proposed.