NbPt2 crystallizes in the orthorhombic Immm space group. Nb(1) is bonded to two equivalent Nb(1) and ten equivalent Pt(1) atoms to form distorted NbNb2Pt10 cuboctahedra that share corners with two equivalent Nb(1)Nb2Pt10 cuboctahedra, corners with ten equivalent Pt(1)Nb5Pt7 cuboctahedra, edges with twelve equivalent Nb(1)Nb2Pt10 cuboctahedra, edges with twelve equivalent Pt(1)Nb5Pt7 cuboctahedra, faces with four equivalent Nb(1)Nb2Pt10 cuboctahedra, and faces with fourteen equivalent Pt(1)Nb5Pt7 cuboctahedra. Pt(1) is bonded to five equivalent Nb(1) and seven equivalent Pt(1) atoms to form distorted PtNb5Pt7 cuboctahedra that share corners with five equivalent Nb(1)Nb2Pt10 cuboctahedra, corners with seven equivalent Pt(1)Nb5Pt7 cuboctahedra, edges with six equivalent Nb(1)Nb2Pt10 cuboctahedra, edges with eighteen equivalent Pt(1)Nb5Pt7 cuboctahedra, faces with seven equivalent Nb(1)Nb2Pt10 cuboctahedra, and faces with eleven equivalent Pt(1)Nb5Pt7 cuboctahedra.
NbPt2 crystallizes in the orthorhombic Immm space group. Nb(1) is bonded to two equivalent Nb(1) and ten equivalent Pt(1) atoms to form distorted NbNb2Pt10 cuboctahedra that share corners with two equivalent Nb(1)Nb2Pt10 cuboctahedra, corners with ten equivalent Pt(1)Nb5Pt7 cuboctahedra, edges with twelve equivalent Nb(1)Nb2Pt10 cuboctahedra, edges with twelve equivalent Pt(1)Nb5Pt7 cuboctahedra, faces with four equivalent Nb(1)Nb2Pt10 cuboctahedra, and faces with fourteen equivalent Pt(1)Nb5Pt7 cuboctahedra. Both Nb(1)-Nb(1) bond lengths are 2.81 Å. There are eight shorter (2.82 Å) and two longer (2.86 Å) Nb(1)-Pt(1) bond lengths. Pt(1) is bonded to five equivalent Nb(1) and seven equivalent Pt(1) atoms to form distorted PtNb5Pt7 cuboctahedra that share corners with five equivalent Nb(1)Nb2Pt10 cuboctahedra, corners with seven equivalent Pt(1)Nb5Pt7 cuboctahedra, edges with six equivalent Nb(1)Nb2Pt10 cuboctahedra, edges with eighteen equivalent Pt(1)Nb5Pt7 cuboctahedra, faces with seven equivalent Nb(1)Nb2Pt10 cuboctahedra, and faces with eleven equivalent Pt(1)Nb5Pt7 cuboctahedra. There are three shorter (2.81 Å) and four longer (2.84 Å) Pt(1)-Pt(1) bond lengths.