Figure 7
Calculated low-symmetry anion-ordered spinel structure with space group and structural formula A4aB16e4X16e4X′16e4. Atom presentation of the ordered spinel structure (a), tetrahedra in the ordered spinel structure (b), B16e metallic tetrahedra (c). A substance with composition Re4As6S3 has a similar structure. In this structure there are Re4 clusters (Besnard et al., 2003). |