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PaGe3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Pa is bonded to twelve equivalent Ge atoms to form a mixture of corner and face-sharing PaGe12 cuboctahedra. All Pa–Ge bond lengths are 3.02 Å. Ge is bonded in a distorted square co-planar geometry to four equivalent Pa atoms.
Pa3Ge is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. The structure is three-dimensional. Pa is bonded to eight equivalent Pa and four equivalent Ge atoms to form distorted PaPa8Ge4 cuboctahedra that share corners with twelve equivalent PaPa8Ge4 cuboctahedra, edges with eight equivalent GePa12 cuboctahedra, edges with sixteen equivalent PaPa8Ge4 cuboctahedra, faces with four equivalent GePa12 cuboctahedra, and faces with fourteen equivalent PaPa8Ge4 cuboctahedra. All Pa–Pa bond lengths are 3.17 Å. All Pa–Ge bond lengths are 3.17 Å. Ge is bonded to twelve equivalent Pa atoms to form GePa12 cuboctahedra that share corners with twelve equivalent GePa12 cuboctahedra, edges with twenty-four equivalent PaPa8Ge4 cuboctahedra, faces with six equivalent GePa12 cuboctahedra, and faces with twelve equivalent PaPa8Ge4 cuboctahedra.