GaTa4Se8 crystallizes in the cubic F-43m space group. Ta(1) is bonded in a 6-coordinate geometry to three equivalent Se(1) and three equivalent Se(2) atoms. Ga(1) is bonded in a tetrahedral geometry to four equivalent Se(2) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 3-coordinate geometry to three equivalent Ta(1) atoms. In the second Se site, Se(2) is bonded to three equivalent Ta(1) and one Ga(1) atom to form a mixture of edge and corner-sharing SeTa3Ga tetrahedra.
GaTa4Se8 crystallizes in the cubic F-43m space group. Ta(1) is bonded in a 6-coordinate geometry to three equivalent Se(1) and three equivalent Se(2) atoms. All Ta(1)-Se(1) bond lengths are 2.53 Å. All Ta(1)-Se(2) bond lengths are 2.79 Å. Ga(1) is bonded in a tetrahedral geometry to four equivalent Se(2) atoms. All Ga(1)-Se(2) bond lengths are 2.44 Å. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 3-coordinate geometry to three equivalent Ta(1) atoms. In the second Se site, Se(2) is bonded to three equivalent Ta(1) and one Ga(1) atom to form a mixture of edge and corner-sharing SeTa3Ga tetrahedra.