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SrBi3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sr is bonded to twelve equivalent Bi atoms to form a mixture of corner and face-sharing SrBi12 cuboctahedra. All Sr–Bi bond lengths are 3.59 Å. Bi is bonded in a square co-planar geometry to four equivalent Sr atoms.
Sr5Bi3 crystallizes in the hexagonal P6_3/mcm space group. The structure is three-dimensional. there are two inequivalent Sr sites. In the first Sr site, Sr is bonded to six equivalent Bi atoms to form a mixture of distorted edge, corner, and face-sharing SrBi6 octahedra. The corner-sharing octahedral tilt angles are 35°. All Sr–Bi bond lengths are 3.56 Å. In the second Sr site, Sr is bonded in a 3-coordinate geometry to five equivalent Bi atoms. There are a spread of Sr–Bi bond distances ranging from 3.36–4.03 Å. Bi is bonded in a 9-coordinate geometry to nine Sr atoms.
Sr4Bi3 crystallizes in the cubic I-43d space group. The structure is three-dimensional. Sr is bonded to six equivalent Bi atoms to form a mixture of distorted edge, face, and corner-sharing SrBi6 octahedra. The corner-sharing octahedra tilt angles range from 18–49°. There are three shorter (3.43 Å) and three longer (3.66 Å) Sr–Bi bond lengths. Bi is bonded to eight equivalent Sr atoms to form a mixture of distorted edge, face, and corner-sharing BiSr8 hexagonal bipyramids.
Sr3BiBi is High-temperature superconductor-like structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional and consists of one bismuth molecule and one Sr3Bi framework. In the Sr3Bi framework, Sr is bonded in a linear geometry to two equivalent Bi atoms. Both Sr–Bi bond lengths are 3.12 Å. Bi is bonded to six equivalent Sr atoms to form corner-sharing BiSr6 octahedra. The corner-sharing octahedral tilt angles are 0°.