InPt2 crystallizes in the monoclinic P2/m space group. There are ten inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Pt(10), two equivalent Pt(5), two equivalent Pt(7), two equivalent Pt(9), one In(4), two equivalent In(1), and two equivalent In(3) atoms to form distorted PtIn5Pt7 cuboctahedra that share  a cornercorner with one Pt(2)In6Pt6 cuboctahedra, corners with three equivalent Pt(1)In5Pt7 cuboctahedra, corners with four equivalent Pt(3)In4Pt8 cuboctahedra, corners with four equivalent Pt(4)In6Pt6 cuboctahedra, edges with two equivalent Pt(10)In4Pt8 cuboctahedra, edges with four equivalent Pt(5)In4Pt8 cuboctahedra, edges with four equivalent In(3)Pt12 cuboctahedra,  a faceface with one Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(3)In4Pt8 cuboctahedra, faces with two equivalent Pt(5)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, faces with two equivalent Pt(4)In6Pt6 cuboctahedra, and faces with two equivalent In(3)Pt12 cuboctahedra. In the second Pt site, Pt(2) is bonded to two equivalent Pt(6), four equivalent Pt(8), two equivalent In(4), and four equivalent In(2) atoms to form distorted PtIn6Pt6 cuboctahedra that share corners with two equivalent Pt(1)In5Pt7 cuboctahedra, corners with two equivalent Pt(2)In6Pt6 cuboctahedra, corners with eight equivalent Pt(4)In6Pt6 cuboctahedra, faces with two equivalent Pt(2)In6Pt6 cuboctahedra, and faces with four equivalent Pt(4)In6Pt6 cuboctahedra. In the third Pt site, Pt(3) is bonded to two equivalent Pt(10), two equivalent Pt(5), four equivalent Pt(9), and four equivalent In(3) atoms to form distorted PtIn4Pt8 cuboctahedra that share corners with two equivalent Pt(3)In4Pt8 cuboctahedra, corners with two equivalent Pt(4)In6Pt6 cuboctahedra, corners with eight equivalent Pt(1)In5Pt7 cuboctahedra, edges with four equivalent Pt(10)In4Pt8 cuboctahedra, edges with four equivalent Pt(5)In4Pt8 cuboctahedra, edges with four equivalent In(3)Pt12 cuboctahedra, faces with two equivalent Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(3)In4Pt8 cuboctahedra, faces with two equivalent Pt(5)In4Pt8 cuboctahedra, faces with four equivalent Pt(1)In5Pt7 cuboctahedra, and faces with four equivalent In(3)Pt12 cuboctahedra. In the fourth Pt site, Pt(4) is bonded to one Pt(5), one Pt(6), two equivalent Pt(7), two equivalent Pt(8), two equivalent In(1), two equivalent In(2), and two equivalent In(4) atoms to form distorted PtIn6Pt6 cuboctahedra that share  a cornercorner with one Pt(3)In4Pt8 cuboctahedra, corners with three equivalent Pt(4)In6Pt6 cuboctahedra, corners with four equivalent Pt(1)In5Pt7 cuboctahedra, corners with four equivalent Pt(2)In6Pt6 cuboctahedra, edges with two equivalent Pt(5)In4Pt8 cuboctahedra, edges with two equivalent In(3)Pt12 cuboctahedra,  a faceface with one Pt(5)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, faces with two equivalent Pt(2)In6Pt6 cuboctahedra, and faces with two equivalent Pt(4)In6Pt6 cuboctahedra. In the fifth Pt site, Pt(5) is bonded to one Pt(3), one Pt(4), two equivalent Pt(1), two equivalent Pt(7), two equivalent Pt(9), two equivalent In(1), and two equivalent In(3) atoms to form distorted PtIn4Pt8 cuboctahedra that share corners with three equivalent Pt(5)In4Pt8 cuboctahedra, corners with four equivalent Pt(10)In4Pt8 cuboctahedra, edges with two equivalent Pt(3)In4Pt8 cuboctahedra, edges with two equivalent Pt(4)In6Pt6 cuboctahedra, edges with four equivalent Pt(1)In5Pt7 cuboctahedra, edges with four equivalent In(3)Pt12 cuboctahedra,  a faceface with one Pt(3)In4Pt8 cuboctahedra,  a faceface with one Pt(4)In6Pt6 cuboctahedra, faces with two equivalent Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(5)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, and faces with two equivalent In(3)Pt12 cuboctahedra. In the sixth Pt site, Pt(6) is bonded in a distorted square co-planar geometry to two equivalent Pt(2), two equivalent Pt(4), and four equivalent In(2) atoms. In the seventh Pt site, Pt(7) is bonded in a 6-coordinate geometry to two equivalent Pt(1), two equivalent Pt(4), two equivalent Pt(5), one In(2), one In(3), two equivalent In(1), and two equivalent In(4) atoms. In the eighth Pt site, Pt(8) is bonded in a 6-coordinate geometry to two equivalent Pt(2), two equivalent Pt(4), one In(1), two equivalent In(4), and three equivalent In(2) atoms. In the ninth Pt site, Pt(9) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Pt(1), two equivalent Pt(10), two equivalent Pt(3), two equivalent Pt(5), one In(1), and three equivalent In(3) atoms. In the tenth Pt site, Pt(10) is bonded to two equivalent Pt(1), two equivalent Pt(3), four equivalent Pt(9), and four equivalent In(3) atoms to form PtIn4Pt8 cuboctahedra that share corners with two equivalent Pt(10)In4Pt8 cuboctahedra, corners with eight equivalent Pt(5)In4Pt8 cuboctahedra, edges with four equivalent Pt(3)In4Pt8 cuboctahedra, edges with four equivalent Pt(1)In5Pt7 cuboctahedra, edges with four equivalent In(3)Pt12 cuboctahedra, faces with two equivalent Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(3)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, faces with four equivalent Pt(5)In4Pt8 cuboctahedra, and faces with four equivalent In(3)Pt12 cuboctahedra. There are four inequivalent In sites. In the first In site, In(1) is bonded in a 10-coordinate geometry to one Pt(8), one Pt(9), two equivalent Pt(1), two equivalent Pt(4), two equivalent Pt(5), and two equivalent Pt(7) atoms. In the second In site, In(2) is bonded in a 10-coordinate geometry to one Pt(7), two equivalent Pt(2), two equivalent Pt(4), two equivalent Pt(6), and three equivalent Pt(8) atoms. In the third In site, In(3) is bonded to one Pt(7), two equivalent Pt(1), two equivalent Pt(10), two equivalent Pt(3), two equivalent Pt(5), and three equivalent Pt(9) atoms to form InPt12 cuboctahedra that share corners with six equivalent In(3)Pt12 cuboctahedra, edges with two equivalent Pt(10)In4Pt8 cuboctahedra, edges with two equivalent Pt(3)In4Pt8 cuboctahedra, edges with two equivalent Pt(4)In6Pt6 cuboctahedra, edges with four equivalent Pt(5)In4Pt8 cuboctahedra, edges with four equivalent Pt(1)In5Pt7 cuboctahedra, faces with two equivalent Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(3)In4Pt8 cuboctahedra, faces with two equivalent Pt(5)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, and faces with four equivalent In(3)Pt12 cuboctahedra. In the fourth In site, In(4) is bonded in a distorted body-centered cubic geometry to one Pt(1), one Pt(2), two equivalent Pt(4), two equivalent Pt(7), and two equivalent Pt(8) atoms.
InPt2 crystallizes in the monoclinic P2/m space group. There are ten inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to one Pt(10), two equivalent Pt(5), two equivalent Pt(7), two equivalent Pt(9), one In(4), two equivalent In(1), and two equivalent In(3) atoms to form distorted PtIn5Pt7 cuboctahedra that share  a cornercorner with one Pt(2)In6Pt6 cuboctahedra, corners with three equivalent Pt(1)In5Pt7 cuboctahedra, corners with four equivalent Pt(3)In4Pt8 cuboctahedra, corners with four equivalent Pt(4)In6Pt6 cuboctahedra, edges with two equivalent Pt(10)In4Pt8 cuboctahedra, edges with four equivalent Pt(5)In4Pt8 cuboctahedra, edges with four equivalent In(3)Pt12 cuboctahedra,  a faceface with one Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(3)In4Pt8 cuboctahedra, faces with two equivalent Pt(5)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, faces with two equivalent Pt(4)In6Pt6 cuboctahedra, and faces with two equivalent In(3)Pt12 cuboctahedra. The Pt(1)-Pt(10) bond length is 2.87 Å. There is one shorter (2.82 Å) and one longer (2.88 Å) Pt(1)-Pt(5) bond length. Both Pt(1)-Pt(7) bond lengths are 2.92 Å. Both Pt(1)-Pt(9) bond lengths are 2.92 Å. The Pt(1)-In(4) bond length is 2.80 Å. Both Pt(1)-In(1) bond lengths are 2.82 Å. Both Pt(1)-In(3) bond lengths are 2.88 Å. In the second Pt site, Pt(2) is bonded to two equivalent Pt(6), four equivalent Pt(8), two equivalent In(4), and four equivalent In(2) atoms to form distorted PtIn6Pt6 cuboctahedra that share corners with two equivalent Pt(1)In5Pt7 cuboctahedra, corners with two equivalent Pt(2)In6Pt6 cuboctahedra, corners with eight equivalent Pt(4)In6Pt6 cuboctahedra, faces with two equivalent Pt(2)In6Pt6 cuboctahedra, and faces with four equivalent Pt(4)In6Pt6 cuboctahedra. Both Pt(2)-Pt(6) bond lengths are 2.85 Å. All Pt(2)-Pt(8) bond lengths are 2.93 Å. Both Pt(2)-In(4) bond lengths are 2.90 Å. All Pt(2)-In(2) bond lengths are 2.85 Å. In the third Pt site, Pt(3) is bonded to two equivalent Pt(10), two equivalent Pt(5), four equivalent Pt(9), and four equivalent In(3) atoms to form distorted PtIn4Pt8 cuboctahedra that share corners with two equivalent Pt(3)In4Pt8 cuboctahedra, corners with two equivalent Pt(4)In6Pt6 cuboctahedra, corners with eight equivalent Pt(1)In5Pt7 cuboctahedra, edges with four equivalent Pt(10)In4Pt8 cuboctahedra, edges with four equivalent Pt(5)In4Pt8 cuboctahedra, edges with four equivalent In(3)Pt12 cuboctahedra, faces with two equivalent Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(3)In4Pt8 cuboctahedra, faces with two equivalent Pt(5)In4Pt8 cuboctahedra, faces with four equivalent Pt(1)In5Pt7 cuboctahedra, and faces with four equivalent In(3)Pt12 cuboctahedra. Both Pt(3)-Pt(10) bond lengths are 2.85 Å. Both Pt(3)-Pt(5) bond lengths are 2.82 Å. All Pt(3)-Pt(9) bond lengths are 2.86 Å. All Pt(3)-In(3) bond lengths are 2.87 Å. In the fourth Pt site, Pt(4) is bonded to one Pt(5), one Pt(6), two equivalent Pt(7), two equivalent Pt(8), two equivalent In(1), two equivalent In(2), and two equivalent In(4) atoms to form distorted PtIn6Pt6 cuboctahedra that share  a cornercorner with one Pt(3)In4Pt8 cuboctahedra, corners with three equivalent Pt(4)In6Pt6 cuboctahedra, corners with four equivalent Pt(1)In5Pt7 cuboctahedra, corners with four equivalent Pt(2)In6Pt6 cuboctahedra, edges with two equivalent Pt(5)In4Pt8 cuboctahedra, edges with two equivalent In(3)Pt12 cuboctahedra,  a faceface with one Pt(5)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, faces with two equivalent Pt(2)In6Pt6 cuboctahedra, and faces with two equivalent Pt(4)In6Pt6 cuboctahedra. The Pt(4)-Pt(5) bond length is 2.89 Å. The Pt(4)-Pt(6) bond length is 2.86 Å. Both Pt(4)-Pt(7) bond lengths are 2.93 Å. Both Pt(4)-Pt(8) bond lengths are 2.94 Å. Both Pt(4)-In(1) bond lengths are 2.86 Å. Both Pt(4)-In(2) bond lengths are 2.84 Å. Both Pt(4)-In(4) bond lengths are 2.85 Å. In the fifth Pt site, Pt(5) is bonded to one Pt(3), one Pt(4), two equivalent Pt(1), two equivalent Pt(7), two equivalent Pt(9), two equivalent In(1), and two equivalent In(3) atoms to form distorted PtIn4Pt8 cuboctahedra that share corners with three equivalent Pt(5)In4Pt8 cuboctahedra, corners with four equivalent Pt(10)In4Pt8 cuboctahedra, edges with two equivalent Pt(3)In4Pt8 cuboctahedra, edges with two equivalent Pt(4)In6Pt6 cuboctahedra, edges with four equivalent Pt(1)In5Pt7 cuboctahedra, edges with four equivalent In(3)Pt12 cuboctahedra,  a faceface with one Pt(3)In4Pt8 cuboctahedra,  a faceface with one Pt(4)In6Pt6 cuboctahedra, faces with two equivalent Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(5)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, and faces with two equivalent In(3)Pt12 cuboctahedra. Both Pt(5)-Pt(7) bond lengths are 2.92 Å. Both Pt(5)-Pt(9) bond lengths are 2.91 Å. Both Pt(5)-In(1) bond lengths are 2.78 Å. Both Pt(5)-In(3) bond lengths are 2.85 Å. In the sixth Pt site, Pt(6) is bonded in a distorted square co-planar geometry to two equivalent Pt(2), two equivalent Pt(4), and four equivalent In(2) atoms. All Pt(6)-In(2) bond lengths are 2.78 Å. In the seventh Pt site, Pt(7) is bonded in a 6-coordinate geometry to two equivalent Pt(1), two equivalent Pt(4), two equivalent Pt(5), one In(2), one In(3), two equivalent In(1), and two equivalent In(4) atoms. The Pt(7)-In(2) bond length is 2.94 Å. The Pt(7)-In(3) bond length is 2.93 Å. There is one shorter (2.78 Å) and one longer (2.95 Å) Pt(7)-In(1) bond length. Both Pt(7)-In(4) bond lengths are 2.73 Å. In the eighth Pt site, Pt(8) is bonded in a 6-coordinate geometry to two equivalent Pt(2), two equivalent Pt(4), one In(1), two equivalent In(4), and three equivalent In(2) atoms. The Pt(8)-In(1) bond length is 2.97 Å. Both Pt(8)-In(4) bond lengths are 2.74 Å. There are a spread of Pt(8)-In(2) bond distances ranging from 2.82-2.91 Å. In the ninth Pt site, Pt(9) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Pt(1), two equivalent Pt(10), two equivalent Pt(3), two equivalent Pt(5), one In(1), and three equivalent In(3) atoms. Both Pt(9)-Pt(10) bond lengths are 2.83 Å. The Pt(9)-In(1) bond length is 2.72 Å. There are a spread of Pt(9)-In(3) bond distances ranging from 2.79-2.87 Å. In the tenth Pt site, Pt(10) is bonded to two equivalent Pt(1), two equivalent Pt(3), four equivalent Pt(9), and four equivalent In(3) atoms to form PtIn4Pt8 cuboctahedra that share corners with two equivalent Pt(10)In4Pt8 cuboctahedra, corners with eight equivalent Pt(5)In4Pt8 cuboctahedra, edges with four equivalent Pt(3)In4Pt8 cuboctahedra, edges with four equivalent Pt(1)In5Pt7 cuboctahedra, edges with four equivalent In(3)Pt12 cuboctahedra, faces with two equivalent Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(3)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, faces with four equivalent Pt(5)In4Pt8 cuboctahedra, and faces with four equivalent In(3)Pt12 cuboctahedra. All Pt(10)-In(3) bond lengths are 2.89 Å. There are four inequivalent In sites. In the first In site, In(1) is bonded in a 10-coordinate geometry to one Pt(8), one Pt(9), two equivalent Pt(1), two equivalent Pt(4), two equivalent Pt(5), and two equivalent Pt(7) atoms. In the second In site, In(2) is bonded in a 10-coordinate geometry to one Pt(7), two equivalent Pt(2), two equivalent Pt(4), two equivalent Pt(6), and three equivalent Pt(8) atoms. In the third In site, In(3) is bonded to one Pt(7), two equivalent Pt(1), two equivalent Pt(10), two equivalent Pt(3), two equivalent Pt(5), and three equivalent Pt(9) atoms to form InPt12 cuboctahedra that share corners with six equivalent In(3)Pt12 cuboctahedra, edges with two equivalent Pt(10)In4Pt8 cuboctahedra, edges with two equivalent Pt(3)In4Pt8 cuboctahedra, edges with two equivalent Pt(4)In6Pt6 cuboctahedra, edges with four equivalent Pt(5)In4Pt8 cuboctahedra, edges with four equivalent Pt(1)In5Pt7 cuboctahedra, faces with two equivalent Pt(10)In4Pt8 cuboctahedra, faces with two equivalent Pt(3)In4Pt8 cuboctahedra, faces with two equivalent Pt(5)In4Pt8 cuboctahedra, faces with two equivalent Pt(1)In5Pt7 cuboctahedra, and faces with four equivalent In(3)Pt12 cuboctahedra. In the fourth In site, In(4) is bonded in a distorted body-centered cubic geometry to one Pt(1), one Pt(2), two equivalent Pt(4), two equivalent Pt(7), and two equivalent Pt(8) atoms.