PtMo is beta-derived structured and crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to four Mo(3,3); two equivalent Pt(1); two equivalent Pt(3); and four Pt(2,2) atoms to form MoMo4Pt8 cuboctahedra that share corners with four equivalent Pt(1)Mo8Pt4 cuboctahedra; corners with six equivalent Mo(1)Mo4Pt8 cuboctahedra; corners with eight Mo(3,3)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(1)Mo8Pt4 cuboctahedra; edges with four Mo(3,3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with eight Pt(2,2,2,2)Mo6Pt6 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with six equivalent Mo(2)Mo4Pt8 cuboctahedra. In the second Mo site, Mo(2) is bonded to four Mo(3,3); two equivalent Pt(1); two equivalent Pt(3); and four Pt(2,2,2,2) atoms to form MoMo4Pt8 cuboctahedra that share corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with six equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with eight Pt(2,2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four Pt(2,2,2,2)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; edges with eight Mo(3,3)Mo6Pt6 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; faces with four Pt(2,2,2,2)Mo6Pt6 cuboctahedra; and faces with six equivalent Mo(1)Mo4Pt8 cuboctahedra. In the third Mo site, Mo(3) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form distorted MoMo6Pt6 cuboctahedra that share corners with four equivalent Mo(1)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(1)Mo8Pt4 cuboctahedra; corners with ten Mo(3,3)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with two equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(1)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with four equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; and faces with eight Pt(2,2,2)Mo6Pt6 cuboctahedra. In the fourth Mo site, Mo(3) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form distorted MoMo6Pt6 cuboctahedra that share corners with four equivalent Mo(1)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(1)Mo8Pt4 cuboctahedra; corners with ten Mo(3,3)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with two equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(1)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with four equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; and faces with eight Pt(2,2,2)Mo6Pt6 cuboctahedra. There are six inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent Mo(1); two equivalent Mo(2); four Mo(3,3); and four Pt(2,2) atoms to form PtMo8Pt4 cuboctahedra that share corners with four equivalent Mo(1)Mo4Pt8 cuboctahedra; corners with six equivalent Pt(1)Mo8Pt4 cuboctahedra; corners with eight Mo(3,3)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with four Mo(3,3)Mo6Pt6 cuboctahedra; edges with eight Pt(2,2,2,2)Mo6Pt6 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with six equivalent Pt(3)Mo8Pt4 cuboctahedra. In the second Pt site, Pt(2) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form PtMo6Pt6 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with ten Pt(2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with two equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with eight Mo(3,3)Mo6Pt6 cuboctahedra. In the third Pt site, Pt(2) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form PtMo6Pt6 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with ten Pt(2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with two equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with eight Mo(3,3)Mo6Pt6 cuboctahedra. In the fourth Pt site, Pt(3) is bonded to two equivalent Mo(1); two equivalent Mo(2); four Mo(3,3); and four Pt(2,2,2,2) atoms to form PtMo8Pt4 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with six equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with eight Pt(2,2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four Pt(2,2,2,2)Mo6Pt6 cuboctahedra; edges with eight Mo(3,3)Mo6Pt6 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; faces with four Pt(2,2,2,2)Mo6Pt6 cuboctahedra; and faces with six equivalent Pt(1)Mo8Pt4 cuboctahedra. In the fifth Pt site, Pt(2) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form PtMo6Pt6 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with ten Pt(2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with two equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with eight Mo(3,3)Mo6Pt6 cuboctahedra. In the sixth Pt site, Pt(2) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form PtMo6Pt6 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with ten Pt(2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with two equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with eight Mo(3,3)Mo6Pt6 cuboctahedra.
PtMo is beta-derived structured and crystallizes in the orthorhombic Amm2 space group. There are four inequivalent Mo sites. In the first Mo site, Mo(1) is bonded to four Mo(3,3); two equivalent Pt(1); two equivalent Pt(3); and four Pt(2,2) atoms to form MoMo4Pt8 cuboctahedra that share corners with four equivalent Pt(1)Mo8Pt4 cuboctahedra; corners with six equivalent Mo(1)Mo4Pt8 cuboctahedra; corners with eight Mo(3,3)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(1)Mo8Pt4 cuboctahedra; edges with four Mo(3,3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with eight Pt(2,2,2,2)Mo6Pt6 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with six equivalent Mo(2)Mo4Pt8 cuboctahedra. There are two shorter (2.75 Å) and two longer (2.89 Å) Mo(1)-Mo(3,3) bond lengths. Both Mo(1)-Pt(1) bond lengths are 2.84 Å. Both Mo(1)-Pt(3) bond lengths are 2.78 Å. All Mo(1)-Pt(2,2) bond lengths are 2.79 Å. In the second Mo site, Mo(2) is bonded to four Mo(3,3); two equivalent Pt(1); two equivalent Pt(3); and four Pt(2,2,2,2) atoms to form MoMo4Pt8 cuboctahedra that share corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with six equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with eight Pt(2,2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four Pt(2,2,2,2)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; edges with eight Mo(3,3)Mo6Pt6 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; faces with four Pt(2,2,2,2)Mo6Pt6 cuboctahedra; and faces with six equivalent Mo(1)Mo4Pt8 cuboctahedra. All Mo(2)-Mo(3,3) bond lengths are 2.77 Å. Both Mo(2)-Pt(1) bond lengths are 2.79 Å. Both Mo(2)-Pt(3) bond lengths are 2.84 Å. There are two shorter (2.82 Å) and two longer (2.83 Å) Mo(2)-Pt(2,2,2,2) bond lengths. In the third Mo site, Mo(3) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form distorted MoMo6Pt6 cuboctahedra that share corners with four equivalent Mo(1)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(1)Mo8Pt4 cuboctahedra; corners with ten Mo(3,3)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with two equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(1)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with four equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; and faces with eight Pt(2,2,2)Mo6Pt6 cuboctahedra. There is one shorter (2.73 Å) and one longer (2.94 Å) Mo(3)-Mo(3) bond length. There is one shorter (2.81 Å) and one longer (2.84 Å) Mo(3)-Pt(1) bond length. Both Mo(3)-Pt(2) bond lengths are 2.75 Å. Both Mo(3)-Pt(3) bond lengths are 2.82 Å. In the fourth Mo site, Mo(3) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form distorted MoMo6Pt6 cuboctahedra that share corners with four equivalent Mo(1)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(1)Mo8Pt4 cuboctahedra; corners with ten Mo(3,3)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with two equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(1)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with four equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; and faces with eight Pt(2,2,2)Mo6Pt6 cuboctahedra. There is one shorter (2.81 Å) and one longer (2.84 Å) Mo(3)-Pt(1) bond length. Both Mo(3)-Pt(2) bond lengths are 2.75 Å. Both Mo(3)-Pt(3) bond lengths are 2.82 Å. There are six inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to two equivalent Mo(1); two equivalent Mo(2); four Mo(3,3); and four Pt(2,2) atoms to form PtMo8Pt4 cuboctahedra that share corners with four equivalent Mo(1)Mo4Pt8 cuboctahedra; corners with six equivalent Pt(1)Mo8Pt4 cuboctahedra; corners with eight Mo(3,3)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with four Mo(3,3)Mo6Pt6 cuboctahedra; edges with eight Pt(2,2,2,2)Mo6Pt6 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with six equivalent Pt(3)Mo8Pt4 cuboctahedra. All Pt(1)-Pt(2,2) bond lengths are 2.78 Å. In the second Pt site, Pt(2) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form PtMo6Pt6 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with ten Pt(2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with two equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with eight Mo(3,3)Mo6Pt6 cuboctahedra. Both Pt(2)-Pt(1) bond lengths are 2.78 Å. There is one shorter (2.81 Å) and one longer (2.86 Å) Pt(2)-Pt(2) bond length. There is one shorter (2.81 Å) and one longer (2.84 Å) Pt(2)-Pt(3) bond length. In the third Pt site, Pt(2) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form PtMo6Pt6 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with ten Pt(2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with two equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with eight Mo(3,3)Mo6Pt6 cuboctahedra. Both Pt(2)-Pt(1) bond lengths are 2.78 Å. There is one shorter (2.81 Å) and one longer (2.84 Å) Pt(2)-Pt(3) bond length. In the fourth Pt site, Pt(3) is bonded to two equivalent Mo(1); two equivalent Mo(2); four Mo(3,3); and four Pt(2,2,2,2) atoms to form PtMo8Pt4 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with six equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with eight Pt(2,2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four Pt(2,2,2,2)Mo6Pt6 cuboctahedra; edges with eight Mo(3,3)Mo6Pt6 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Mo(3,3)Mo6Pt6 cuboctahedra; faces with four Pt(2,2,2,2)Mo6Pt6 cuboctahedra; and faces with six equivalent Pt(1)Mo8Pt4 cuboctahedra. Both Pt(3)-Pt(2,2) bond lengths are 2.81 Å. In the fifth Pt site, Pt(2) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form PtMo6Pt6 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with ten Pt(2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with two equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with eight Mo(3,3)Mo6Pt6 cuboctahedra. Both Pt(2)-Mo(1) bond lengths are 2.79 Å. Both Pt(2)-Mo(3) bond lengths are 2.75 Å. There is one shorter (2.81 Å) and one longer (2.86 Å) Pt(2)-Pt(2) bond length. In the sixth Pt site, Pt(2) is bonded to two equivalent Mo(1), two equivalent Mo(2), two equivalent Mo(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Pt(3) atoms to form PtMo6Pt6 cuboctahedra that share corners with four equivalent Mo(2)Mo4Pt8 cuboctahedra; corners with four equivalent Pt(3)Mo8Pt4 cuboctahedra; corners with ten Pt(2,2,2)Mo6Pt6 cuboctahedra; edges with two equivalent Mo(2)Mo4Pt8 cuboctahedra; edges with two equivalent Pt(2)Mo6Pt6 cuboctahedra; edges with two equivalent Pt(3)Mo8Pt4 cuboctahedra; edges with four equivalent Mo(1)Mo4Pt8 cuboctahedra; edges with four equivalent Mo(3)Mo6Pt6 cuboctahedra; edges with four equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Mo(1)Mo4Pt8 cuboctahedra; faces with two equivalent Mo(2)Mo4Pt8 cuboctahedra; faces with two equivalent Pt(1)Mo8Pt4 cuboctahedra; faces with two equivalent Pt(3)Mo8Pt4 cuboctahedra; faces with four Pt(2,2)Mo6Pt6 cuboctahedra; and faces with eight Mo(3,3)Mo6Pt6 cuboctahedra. Both Pt(2)-Mo(1) bond lengths are 2.79 Å. Both Pt(2)-Mo(3) bond lengths are 2.75 Å.