Mn2Sb crystallizes in the tetragonal P4/nmm space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to four equivalent Mn(1), four equivalent Mn(2), and four equivalent Sb(1) atoms to form distorted MnMn8Sb4 cuboctahedra that share corners with four equivalent Mn(1)Mn8Sb4 cuboctahedra, corners with four equivalent Mn(2)Mn4Sb5 square pyramids, edges with eight equivalent Mn(2)Mn4Sb5 square pyramids, faces with eight equivalent Mn(1)Mn8Sb4 cuboctahedra, and faces with four equivalent Mn(2)Mn4Sb5 square pyramids. In the second Mn site, Mn(2) is bonded to four equivalent Mn(1) and five equivalent Sb(1) atoms to form distorted MnMn4Sb5 square pyramids that share corners with four equivalent Mn(1)Mn8Sb4 cuboctahedra, corners with four equivalent Mn(2)Mn4Sb5 square pyramids, edges with eight equivalent Mn(1)Mn8Sb4 cuboctahedra, edges with eight equivalent Mn(2)Mn4Sb5 square pyramids, faces with four equivalent Mn(1)Mn8Sb4 cuboctahedra, and faces with four equivalent Mn(2)Mn4Sb5 square pyramids. Sb(1) is bonded in a 9-coordinate geometry to four equivalent Mn(1) and five equivalent Mn(2) atoms.
Mn2Sb crystallizes in the tetragonal P4/nmm space group. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to four equivalent Mn(1), four equivalent Mn(2), and four equivalent Sb(1) atoms to form distorted MnMn8Sb4 cuboctahedra that share corners with four equivalent Mn(1)Mn8Sb4 cuboctahedra, corners with four equivalent Mn(2)Mn4Sb5 square pyramids, edges with eight equivalent Mn(2)Mn4Sb5 square pyramids, faces with eight equivalent Mn(1)Mn8Sb4 cuboctahedra, and faces with four equivalent Mn(2)Mn4Sb5 square pyramids. All Mn(1)-Mn(1) bond lengths are 2.86 Å. All Mn(1)-Mn(2) bond lengths are 2.89 Å. All Mn(1)-Sb(1) bond lengths are 2.81 Å. In the second Mn site, Mn(2) is bonded to four equivalent Mn(1) and five equivalent Sb(1) atoms to form distorted MnMn4Sb5 square pyramids that share corners with four equivalent Mn(1)Mn8Sb4 cuboctahedra, corners with four equivalent Mn(2)Mn4Sb5 square pyramids, edges with eight equivalent Mn(1)Mn8Sb4 cuboctahedra, edges with eight equivalent Mn(2)Mn4Sb5 square pyramids, faces with four equivalent Mn(1)Mn8Sb4 cuboctahedra, and faces with four equivalent Mn(2)Mn4Sb5 square pyramids. There is one shorter (2.77 Å) and four longer (2.86 Å) Mn(2)-Sb(1) bond lengths. Sb(1) is bonded in a 9-coordinate geometry to four equivalent Mn(1) and five equivalent Mn(2) atoms.