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Pb3Sr is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Sr is bonded to twelve equivalent Pb atoms to form a mixture of face and corner-sharing SrPb12 cuboctahedra. All Sr–Pb bond lengths are 3.57 Å. Pb is bonded in a square co-planar geometry to four equivalent Sr atoms.
Sr2Pb is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Sr sites. In the first Sr site, Sr is bonded in a 5-coordinate geometry to five equivalent Pb atoms. There are a spread of Sr–Pb bond distances ranging from 3.54–4.02 Å. In the second Sr site, Sr is bonded to four equivalent Pb atoms to form a mixture of edge and corner-sharing SrPb4 tetrahedra. There are a spread of Sr–Pb bond distances ranging from 3.38–3.48 Å. Pb is bonded in a 9-coordinate geometry to nine Sr atoms.
Sr2Pb3 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. Sr is bonded in a 6-coordinate geometry to ten Pb atoms. There are a spread of Sr–Pb bond distances ranging from 3.44–3.99 Å. There are two inequivalent Pb sites. In the first Pb site, Pb is bonded in a 9-coordinate geometry to six equivalent Sr and three Pb atoms. There are one shorter (3.07 Å) and two longer (3.31 Å) Pb–Pb bond lengths. In the second Pb site, Pb is bonded to eight equivalent Sr and four equivalent Pb atoms to form a mixture of face and corner-sharing PbSr8Pb4 cuboctahedra.