Sr5Cd3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a square co-planar geometry to four equivalent Cd(2) atoms. In the second Sr site, Sr(2) is bonded to two equivalent Cd(1) and three equivalent Cd(2) atoms to form a mixture of distorted edge, corner, and face-sharing SrCd5 trigonal bipyramids. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 8-coordinate geometry to eight equivalent Sr(2) atoms. In the second Cd site, Cd(2) is bonded in a 9-coordinate geometry to two equivalent Sr(1), six equivalent Sr(2), and one Cd(2) atom.
Sr5Cd3 crystallizes in the tetragonal I4/mcm space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a square co-planar geometry to four equivalent Cd(2) atoms. All Sr(1)-Cd(2) bond lengths are 3.49 Å. In the second Sr site, Sr(2) is bonded to two equivalent Cd(1) and three equivalent Cd(2) atoms to form a mixture of distorted edge, corner, and face-sharing SrCd5 trigonal bipyramids. Both Sr(2)-Cd(1) bond lengths are 3.67 Å. There are two shorter (3.53 Å) and one longer (3.54 Å) Sr(2)-Cd(2) bond length. There are two inequivalent Cd sites. In the first Cd site, Cd(1) is bonded in a 8-coordinate geometry to eight equivalent Sr(2) atoms. In the second Cd site, Cd(2) is bonded in a 9-coordinate geometry to two equivalent Sr(1), six equivalent Sr(2), and one Cd(2) atom. The Cd(2)-Cd(2) bond length is 3.01 Å.