Mn3Os is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. Mn(1) is bonded to eight equivalent Mn(1) and four equivalent Os(1) atoms to form distorted MnMn8Os4 cuboctahedra that share corners with four equivalent Os(1)Mn12 cuboctahedra, corners with fourteen equivalent Mn(1)Mn8Os4 cuboctahedra, edges with six equivalent Os(1)Mn12 cuboctahedra, edges with twelve equivalent Mn(1)Mn8Os4 cuboctahedra, faces with four equivalent Os(1)Mn12 cuboctahedra, and faces with sixteen equivalent Mn(1)Mn8Os4 cuboctahedra. Os(1) is bonded to twelve equivalent Mn(1) atoms to form OsMn12 cuboctahedra that share corners with six equivalent Os(1)Mn12 cuboctahedra, corners with twelve equivalent Mn(1)Mn8Os4 cuboctahedra, edges with eighteen equivalent Mn(1)Mn8Os4 cuboctahedra, faces with eight equivalent Os(1)Mn12 cuboctahedra, and faces with twelve equivalent Mn(1)Mn8Os4 cuboctahedra.
Mn3Os is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. Mn(1) is bonded to eight equivalent Mn(1) and four equivalent Os(1) atoms to form distorted MnMn8Os4 cuboctahedra that share corners with four equivalent Os(1)Mn12 cuboctahedra, corners with fourteen equivalent Mn(1)Mn8Os4 cuboctahedra, edges with six equivalent Os(1)Mn12 cuboctahedra, edges with twelve equivalent Mn(1)Mn8Os4 cuboctahedra, faces with four equivalent Os(1)Mn12 cuboctahedra, and faces with sixteen equivalent Mn(1)Mn8Os4 cuboctahedra. There are six shorter (2.48 Å) and two longer (2.62 Å) Mn(1)-Mn(1) bond lengths. There are two shorter (2.53 Å) and two longer (2.55 Å) Mn(1)-Os(1) bond lengths. Os(1) is bonded to twelve equivalent Mn(1) atoms to form OsMn12 cuboctahedra that share corners with six equivalent Os(1)Mn12 cuboctahedra, corners with twelve equivalent Mn(1)Mn8Os4 cuboctahedra, edges with eighteen equivalent Mn(1)Mn8Os4 cuboctahedra, faces with eight equivalent Os(1)Mn12 cuboctahedra, and faces with twelve equivalent Mn(1)Mn8Os4 cuboctahedra.