ScIn2 crystallizes in the orthorhombic Cmmm space group. Sc(1) is bonded in a 10-coordinate geometry to two equivalent In(2), two equivalent In(3), and six equivalent In(1) atoms. There are three inequivalent In sites. In the first In site, In(1) is bonded to six equivalent Sc(1), two equivalent In(1), two equivalent In(2), and two equivalent In(3) atoms to form distorted InSc6In6 cuboctahedra that share corners with four equivalent In(2)Sc4In4 cuboctahedra, corners with eight equivalent In(3)Sc4In4 cuboctahedra, corners with eight equivalent In(1)Sc6In6 cuboctahedra, edges with two equivalent In(3)Sc4In4 cuboctahedra, edges with four equivalent In(1)Sc6In6 cuboctahedra, edges with six equivalent In(2)Sc4In4 cuboctahedra,  a faceface with one In(3)Sc4In4 cuboctahedra, and faces with seven equivalent In(1)Sc6In6 cuboctahedra. In the second In site, In(2) is bonded to four equivalent Sc(1) and four equivalent In(1) atoms to form distorted InSc4In4 cuboctahedra that share corners with eight equivalent In(1)Sc6In6 cuboctahedra, edges with four equivalent In(2)Sc4In4 cuboctahedra, edges with twelve equivalent In(1)Sc6In6 cuboctahedra, and faces with four equivalent In(3)Sc4In4 cuboctahedra. In the third In site, In(3) is bonded to four equivalent Sc(1) and four equivalent In(1) atoms to form distorted InSc4In4 cuboctahedra that share corners with sixteen equivalent In(1)Sc6In6 cuboctahedra, edges with four equivalent In(3)Sc4In4 cuboctahedra, edges with four equivalent In(1)Sc6In6 cuboctahedra, faces with two equivalent In(1)Sc6In6 cuboctahedra, and faces with four equivalent In(2)Sc4In4 cuboctahedra.
ScIn2 crystallizes in the orthorhombic Cmmm space group. Sc(1) is bonded in a 10-coordinate geometry to two equivalent In(2), two equivalent In(3), and six equivalent In(1) atoms. Both Sc(1)-In(2) bond lengths are 3.09 Å. Both Sc(1)-In(3) bond lengths are 3.09 Å. There are four shorter (3.17 Å) and two longer (3.19 Å) Sc(1)-In(1) bond lengths. There are three inequivalent In sites. In the first In site, In(1) is bonded to six equivalent Sc(1), two equivalent In(1), two equivalent In(2), and two equivalent In(3) atoms to form distorted InSc6In6 cuboctahedra that share corners with four equivalent In(2)Sc4In4 cuboctahedra, corners with eight equivalent In(3)Sc4In4 cuboctahedra, corners with eight equivalent In(1)Sc6In6 cuboctahedra, edges with two equivalent In(3)Sc4In4 cuboctahedra, edges with four equivalent In(1)Sc6In6 cuboctahedra, edges with six equivalent In(2)Sc4In4 cuboctahedra,  a faceface with one In(3)Sc4In4 cuboctahedra, and faces with seven equivalent In(1)Sc6In6 cuboctahedra. Both In(1)-In(1) bond lengths are 3.01 Å. Both In(1)-In(2) bond lengths are 3.28 Å. Both In(1)-In(3) bond lengths are 3.28 Å. In the second In site, In(2) is bonded to four equivalent Sc(1) and four equivalent In(1) atoms to form distorted InSc4In4 cuboctahedra that share corners with eight equivalent In(1)Sc6In6 cuboctahedra, edges with four equivalent In(2)Sc4In4 cuboctahedra, edges with twelve equivalent In(1)Sc6In6 cuboctahedra, and faces with four equivalent In(3)Sc4In4 cuboctahedra. In the third In site, In(3) is bonded to four equivalent Sc(1) and four equivalent In(1) atoms to form distorted InSc4In4 cuboctahedra that share corners with sixteen equivalent In(1)Sc6In6 cuboctahedra, edges with four equivalent In(3)Sc4In4 cuboctahedra, edges with four equivalent In(1)Sc6In6 cuboctahedra, faces with two equivalent In(1)Sc6In6 cuboctahedra, and faces with four equivalent In(2)Sc4In4 cuboctahedra.