Materials Data on Na10SrSn12 by Materials Project
Na10SrSn12 crystallizes in the cubic I-43m space group. The structure is three-dimensional. there are two inequivalent Na sites. In the first Na site, Na is bonded to four equivalent Sn atoms to form corner-sharing NaSn4 tetrahedra. All Na–Sn bond lengths are 3.25 Å. In the second Na site, Na is bonded in a 9-coordinate geometry to nine equivalent Sn atoms. There are three shorter (3.45 Å) and six longer (3.58 Å) Na–Sn bond lengths. Sr is bonded in a 12-coordinate geometry to twelve equivalent Sn atoms. All Sr–Sn bond lengths are 3.51 Å. Sn is bonded in a 9-coordinate geometry to five Na, one Sr, and three equivalent Sn atoms. There are one shorter (2.95 Å) and two longer (3.03 Å) Sn–Sn bond lengths.
36 MATERIALS SCIENCE↗