Mg2Sn crystallizes in the monoclinic C2/c space group. Mg(1) is bonded to seven equivalent Mg(1) and five equivalent Sn(1) atoms to form distorted MgMg7Sn5 cuboctahedra that share corners with six equivalent Sn(1)Mg10Sn2 cuboctahedra, corners with twelve equivalent Mg(1)Mg7Sn5 cuboctahedra, edges with four equivalent Sn(1)Mg10Sn2 cuboctahedra, edges with fourteen equivalent Mg(1)Mg7Sn5 cuboctahedra, faces with eight equivalent Sn(1)Mg10Sn2 cuboctahedra, and faces with twelve equivalent Mg(1)Mg7Sn5 cuboctahedra. Sn(1) is bonded to ten equivalent Mg(1) and two equivalent Sn(1) atoms to form distorted SnMg10Sn2 cuboctahedra that share corners with six equivalent Sn(1)Mg10Sn2 cuboctahedra, corners with twelve equivalent Mg(1)Mg7Sn5 cuboctahedra, edges with eight equivalent Mg(1)Mg7Sn5 cuboctahedra, edges with ten equivalent Sn(1)Mg10Sn2 cuboctahedra, faces with four equivalent Sn(1)Mg10Sn2 cuboctahedra, and faces with sixteen equivalent Mg(1)Mg7Sn5 cuboctahedra.
Mg2Sn crystallizes in the monoclinic C2/c space group. Mg(1) is bonded to seven equivalent Mg(1) and five equivalent Sn(1) atoms to form distorted MgMg7Sn5 cuboctahedra that share corners with six equivalent Sn(1)Mg10Sn2 cuboctahedra, corners with twelve equivalent Mg(1)Mg7Sn5 cuboctahedra, edges with four equivalent Sn(1)Mg10Sn2 cuboctahedra, edges with fourteen equivalent Mg(1)Mg7Sn5 cuboctahedra, faces with eight equivalent Sn(1)Mg10Sn2 cuboctahedra, and faces with twelve equivalent Mg(1)Mg7Sn5 cuboctahedra. There are a spread of Mg(1)-Mg(1) bond distances ranging from 3.19-3.26 Å. There are a spread of Mg(1)-Sn(1) bond distances ranging from 3.19-3.32 Å. Sn(1) is bonded to ten equivalent Mg(1) and two equivalent Sn(1) atoms to form distorted SnMg10Sn2 cuboctahedra that share corners with six equivalent Sn(1)Mg10Sn2 cuboctahedra, corners with twelve equivalent Mg(1)Mg7Sn5 cuboctahedra, edges with eight equivalent Mg(1)Mg7Sn5 cuboctahedra, edges with ten equivalent Sn(1)Mg10Sn2 cuboctahedra, faces with four equivalent Sn(1)Mg10Sn2 cuboctahedra, and faces with sixteen equivalent Mg(1)Mg7Sn5 cuboctahedra. Both Sn(1)-Sn(1) bond lengths are 3.27 Å.