Sn(Mo3Se4)2 crystallizes in the trigonal R-3 space group. Mo(1) is bonded to one Se(1) and four equivalent Se(2) atoms to form a mixture of distorted corner and edge-sharing MoSe5 square pyramids. Sn(1) is bonded in a body-centered cubic geometry to two equivalent Se(1) and six equivalent Se(2) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 4-coordinate geometry to three equivalent Mo(1) and one Sn(1) atom. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to four equivalent Mo(1) and one Sn(1) atom.
Sn(Mo3Se4)2 crystallizes in the trigonal R-3 space group. Mo(1) is bonded to one Se(1) and four equivalent Se(2) atoms to form a mixture of distorted corner and edge-sharing MoSe5 square pyramids. The Mo(1)-Se(1) bond length is 2.53 Å. There are a spread of Mo(1)-Se(2) bond distances ranging from 2.59-2.77 Å. Sn(1) is bonded in a body-centered cubic geometry to two equivalent Se(1) and six equivalent Se(2) atoms. Both Sn(1)-Se(1) bond lengths are 2.88 Å. All Sn(1)-Se(2) bond lengths are 3.22 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 4-coordinate geometry to three equivalent Mo(1) and one Sn(1) atom. In the second Se site, Se(2) is bonded in a 5-coordinate geometry to four equivalent Mo(1) and one Sn(1) atom.