Citation: Gaudin, E.; Petricek, V.; Boucher, F.; Taulelle, F.; Evain, M. (2000). Structures and phase transitions of the A~7~PSe~6~ (A = Ag, Cu) argyrodite-type ionic conductors. III. \a-Cu~7~PSe~6~. Acta Crystallographica Section B, 56, pp. 972-979.