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PmSn3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Pm is bonded to twelve equivalent Sn atoms to form a mixture of face and corner-sharing PmSn12 cuboctahedra. All Pm–Sn bond lengths are 3.37 Å. Sn is bonded in a distorted square co-planar geometry to four equivalent Pm atoms.
Pm3Sn is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Pm is bonded in a distorted square co-planar geometry to four equivalent Sn atoms. All Pm–Sn bond lengths are 3.49 Å. Sn is bonded to twelve equivalent Pm atoms to form a mixture of corner and face-sharing SnPm12 cuboctahedra.