Rb(ThSe3)2 crystallizes in the orthorhombic Immm space group. Rb(1) is bonded in a distorted body-centered cubic geometry to eight equivalent Se(1) atoms. Th(1) is bonded in a 8-coordinate geometry to four equivalent Se(1) and four equivalent Se(2) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Th(1), and two equivalent Se(1) atoms. In the second Se site, Se(2) is bonded to four equivalent Th(1) atoms to form a mixture of distorted edge and corner-sharing SeTh4 tetrahedra.
Rb(ThSe3)2 crystallizes in the orthorhombic Immm space group. Rb(1) is bonded in a distorted body-centered cubic geometry to eight equivalent Se(1) atoms. All Rb(1)-Se(1) bond lengths are 3.54 Å. Th(1) is bonded in a 8-coordinate geometry to four equivalent Se(1) and four equivalent Se(2) atoms. All Th(1)-Se(1) bond lengths are 3.01 Å. There are two shorter (2.98 Å) and two longer (3.02 Å) Th(1)-Se(2) bond lengths. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 6-coordinate geometry to two equivalent Rb(1), two equivalent Th(1), and two equivalent Se(1) atoms. There is one shorter (2.73 Å) and one longer (2.86 Å) Se(1)-Se(1) bond length. In the second Se site, Se(2) is bonded to four equivalent Th(1) atoms to form a mixture of distorted edge and corner-sharing SeTh4 tetrahedra.