Th3In5 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 9-coordinate geometry to one In(1), four equivalent In(2), and four equivalent In(3) atoms. In the second Th site, Th(2) is bonded in a 10-coordinate geometry to two equivalent In(1), four equivalent In(2), and four equivalent In(3) atoms. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 9-coordinate geometry to one Th(1), four equivalent Th(2), two equivalent In(2), and two equivalent In(3) atoms. In the second In site, In(2) is bonded in a 10-coordinate geometry to two equivalent Th(1), four equivalent Th(2), one In(1), one In(2), and two equivalent In(3) atoms. In the third In site, In(3) is bonded in a 9-coordinate geometry to two equivalent Th(1), four equivalent Th(2), one In(1), and two equivalent In(2) atoms.
Th3In5 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 9-coordinate geometry to one In(1), four equivalent In(2), and four equivalent In(3) atoms. The Th(1)-In(1) bond length is 3.20 Å. There are two shorter (3.17 Å) and two longer (3.40 Å) Th(1)-In(2) bond lengths. There are two shorter (3.25 Å) and two longer (3.61 Å) Th(1)-In(3) bond lengths. In the second Th site, Th(2) is bonded in a 10-coordinate geometry to two equivalent In(1), four equivalent In(2), and four equivalent In(3) atoms. Both Th(2)-In(1) bond lengths are 3.36 Å. There are two shorter (3.36 Å) and two longer (3.46 Å) Th(2)-In(2) bond lengths. There are two shorter (3.28 Å) and two longer (3.51 Å) Th(2)-In(3) bond lengths. There are three inequivalent In sites. In the first In site, In(1) is bonded in a 9-coordinate geometry to one Th(1), four equivalent Th(2), two equivalent In(2), and two equivalent In(3) atoms. Both In(1)-In(2) bond lengths are 3.17 Å. Both In(1)-In(3) bond lengths are 3.07 Å. In the second In site, In(2) is bonded in a 10-coordinate geometry to two equivalent Th(1), four equivalent Th(2), one In(1), one In(2), and two equivalent In(3) atoms. The In(2)-In(2) bond length is 3.37 Å. Both In(2)-In(3) bond lengths are 2.99 Å. In the third In site, In(3) is bonded in a 9-coordinate geometry to two equivalent Th(1), four equivalent Th(2), one In(1), and two equivalent In(2) atoms.