OsPt4 crystallizes in the trigonal R-3m space group. Os(1) is bonded to six equivalent Os(1) and six equivalent Pt(1) atoms to form OsOs6Pt6 cuboctahedra that share corners with six equivalent Os(1)Os6Pt6 cuboctahedra; corners with six Pt(2,2)Pt12 cuboctahedra; edges with six equivalent Os(1)Os6Pt6 cuboctahedra; edges with six Pt(2,2)Pt12 cuboctahedra; edges with twelve equivalent Pt(1)Os3Pt9 cuboctahedra; faces with six equivalent Os(1)Os6Pt6 cuboctahedra; and faces with twelve equivalent Pt(1)Os3Pt9 cuboctahedra. There are six inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to three equivalent Os(1), three equivalent Pt(2), and six equivalent Pt(1) atoms to form PtOs3Pt9 cuboctahedra that share corners with three equivalent Pt(2)Pt12 cuboctahedra; corners with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with six equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with nine Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Os(1)Os6Pt6 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with six equivalent Pt(2)Pt12 cuboctahedra. In the second Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. In the third Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. In the fourth Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. In the fifth Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. In the sixth Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra.
OsPt4 crystallizes in the trigonal R-3m space group. Os(1) is bonded to six equivalent Os(1) and six equivalent Pt(1) atoms to form OsOs6Pt6 cuboctahedra that share corners with six equivalent Os(1)Os6Pt6 cuboctahedra; corners with six Pt(2,2)Pt12 cuboctahedra; edges with six equivalent Os(1)Os6Pt6 cuboctahedra; edges with six Pt(2,2)Pt12 cuboctahedra; edges with twelve equivalent Pt(1)Os3Pt9 cuboctahedra; faces with six equivalent Os(1)Os6Pt6 cuboctahedra; and faces with twelve equivalent Pt(1)Os3Pt9 cuboctahedra. All Os(1)-Os(1) bond lengths are 2.80 Å. All Os(1)-Pt(1) bond lengths are 2.71 Å. There are six inequivalent Pt sites. In the first Pt site, Pt(1) is bonded to three equivalent Os(1), three equivalent Pt(2), and six equivalent Pt(1) atoms to form PtOs3Pt9 cuboctahedra that share corners with three equivalent Pt(2)Pt12 cuboctahedra; corners with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with six equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with nine Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Os(1)Os6Pt6 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with six equivalent Pt(2)Pt12 cuboctahedra. All Pt(1)-Pt(2) bond lengths are 2.84 Å. All Pt(1)-Pt(1) bond lengths are 2.80 Å. In the second Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. There are six shorter (2.80 Å) and three longer (2.84 Å) Pt(2)-Pt(2,2) bond lengths. In the third Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. All Pt(2)-Pt(1) bond lengths are 2.84 Å. All Pt(2)-Pt(2) bond lengths are 2.80 Å. In the fourth Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. All Pt(2)-Pt(1) bond lengths are 2.84 Å. There are six shorter (2.80 Å) and three longer (2.84 Å) Pt(2)-Pt(2,2) bond lengths. In the fifth Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. All Pt(2)-Pt(1) bond lengths are 2.84 Å. There are six shorter (2.80 Å) and three longer (2.84 Å) Pt(2)-Pt(2,2) bond lengths. In the sixth Pt site, Pt(2) is bonded to three equivalent Pt(1) and nine Pt(2,2) atoms to form PtPt12 cuboctahedra that share corners with three equivalent Os(1)Os6Pt6 cuboctahedra; corners with three equivalent Pt(1)Os3Pt9 cuboctahedra; corners with six equivalent Pt(2)Pt12 cuboctahedra; edges with three equivalent Os(1)Os6Pt6 cuboctahedra; edges with nine equivalent Pt(1)Os3Pt9 cuboctahedra; edges with twelve Pt(2,2)Pt12 cuboctahedra; faces with six equivalent Pt(1)Os3Pt9 cuboctahedra; and faces with twelve Pt(2,2)Pt12 cuboctahedra. All Pt(2)-Pt(1) bond lengths are 2.84 Å. All Pt(2)-Pt(2) bond lengths are 2.80 Å.