Ba5Sn3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to two equivalent Sn(1) and three equivalent Sn(2) atoms to form a mixture of distorted corner, face, and edge-sharing BaSn5 trigonal bipyramids. In the second Ba site, Ba(2) is bonded in a square co-planar geometry to four equivalent Sn(2) atoms. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to eight equivalent Ba(1) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent Ba(2), six equivalent Ba(1), and one Sn(2) atom.
Ba5Sn3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to two equivalent Sn(1) and three equivalent Sn(2) atoms to form a mixture of distorted corner, face, and edge-sharing BaSn5 trigonal bipyramids. Both Ba(1)-Sn(1) bond lengths are 3.82 Å. There is one shorter (3.60 Å) and two longer (3.67 Å) Ba(1)-Sn(2) bond lengths. In the second Ba site, Ba(2) is bonded in a square co-planar geometry to four equivalent Sn(2) atoms. All Ba(2)-Sn(2) bond lengths are 3.66 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 8-coordinate geometry to eight equivalent Ba(1) atoms. In the second Sn site, Sn(2) is bonded in a 9-coordinate geometry to two equivalent Ba(2), six equivalent Ba(1), and one Sn(2) atom. The Sn(2)-Sn(2) bond length is 2.94 Å.