Sn3Ag crystallizes in the hexagonal P6_3/mmc space group. Ag(1) is bonded to twelve equivalent Sn(1) atoms to form AgSn12 cuboctahedra that share corners with six equivalent Ag(1)Sn12 cuboctahedra, corners with twelve equivalent Sn(1)Ag4Sn8 cuboctahedra, edges with eighteen equivalent Sn(1)Ag4Sn8 cuboctahedra, faces with eight equivalent Ag(1)Sn12 cuboctahedra, and faces with twelve equivalent Sn(1)Ag4Sn8 cuboctahedra. Sn(1) is bonded to four equivalent Ag(1) and eight equivalent Sn(1) atoms to form distorted SnAg4Sn8 cuboctahedra that share corners with four equivalent Ag(1)Sn12 cuboctahedra, corners with fourteen equivalent Sn(1)Ag4Sn8 cuboctahedra, edges with six equivalent Ag(1)Sn12 cuboctahedra, edges with twelve equivalent Sn(1)Ag4Sn8 cuboctahedra, faces with four equivalent Ag(1)Sn12 cuboctahedra, and faces with sixteen equivalent Sn(1)Ag4Sn8 cuboctahedra.
Sn3Ag crystallizes in the hexagonal P6_3/mmc space group. Ag(1) is bonded to twelve equivalent Sn(1) atoms to form AgSn12 cuboctahedra that share corners with six equivalent Ag(1)Sn12 cuboctahedra, corners with twelve equivalent Sn(1)Ag4Sn8 cuboctahedra, edges with eighteen equivalent Sn(1)Ag4Sn8 cuboctahedra, faces with eight equivalent Ag(1)Sn12 cuboctahedra, and faces with twelve equivalent Sn(1)Ag4Sn8 cuboctahedra. There are six shorter (3.22 Å) and six longer (3.39 Å) Ag(1)-Sn(1) bond lengths. Sn(1) is bonded to four equivalent Ag(1) and eight equivalent Sn(1) atoms to form distorted SnAg4Sn8 cuboctahedra that share corners with four equivalent Ag(1)Sn12 cuboctahedra, corners with fourteen equivalent Sn(1)Ag4Sn8 cuboctahedra, edges with six equivalent Ag(1)Sn12 cuboctahedra, edges with twelve equivalent Sn(1)Ag4Sn8 cuboctahedra, faces with four equivalent Ag(1)Sn12 cuboctahedra, and faces with sixteen equivalent Sn(1)Ag4Sn8 cuboctahedra. There are a spread of Sn(1)-Sn(1) bond distances ranging from 3.26-3.44 Å.