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SrCd is Tetraauricupride structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sr is bonded in a body-centered cubic geometry to eight equivalent Cd atoms. All Sr–Cd bond lengths are 3.53 Å. Cd is bonded in a body-centered cubic geometry to eight equivalent Sr atoms.
Sr5Cd3 crystallizes in the tetragonal I4/mcm space group. The structure is three-dimensional. there are two inequivalent Sr sites. In the first Sr site, Sr is bonded to five Cd atoms to form a mixture of distorted edge, corner, and face-sharing SrCd5 trigonal bipyramids. There are a spread of Sr–Cd bond distances ranging from 3.56–3.66 Å. In the second Sr site, Sr is bonded in a square co-planar geometry to four equivalent Cd atoms. All Sr–Cd bond lengths are 3.44 Å. There are two inequivalent Cd sites. In the first Cd site, Cd is bonded in a 9-coordinate geometry to eight Sr and one Cd atom. The Cd–Cd bond length is 3.00 Å. In the second Cd site, Cd is bonded in a 8-coordinate geometry to eight equivalent Sr atoms.
SrCd11 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional. Sr is bonded in a 8-coordinate geometry to eighteen Cd atoms. There are a spread of Sr–Cd bond distances ranging from 3.73–3.92 Å. There are three inequivalent Cd sites. In the first Cd site, Cd is bonded in a 6-coordinate geometry to two equivalent Sr and twelve Cd atoms. There are four shorter (3.20 Å) and eight longer (3.29 Å) Cd–Cd bond lengths. In the second Cd site, Cd is bonded in a 12-coordinate geometry to two equivalent Sr and ten Cd atoms. There are a spread of Cd–Cd bond distances ranging from 2.93–3.46 Å. In the third Cd site, Cd is bonded in a distorted q6 geometry to ten Cd atoms.
SrCd2 crystallizes in the orthorhombic Imma space group. The structure is three-dimensional. Sr is bonded in a 12-coordinate geometry to twelve equivalent Cd atoms. There are a spread of Sr–Cd bond distances ranging from 3.52–3.72 Å. Cd is bonded in a 10-coordinate geometry to six equivalent Sr and four equivalent Cd atoms. There are a spread of Cd–Cd bond distances ranging from 2.97–3.17 Å.