PmGe3 crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to twelve equivalent Ge(1) atoms to form a mixture of face and corner-sharing PmGe12 cuboctahedra. Ge(1) is bonded in a 10-coordinate geometry to four equivalent Pm(1) and six equivalent Ge(1) atoms.
PmGe3 crystallizes in the hexagonal P6_3/mmc space group. Pm(1) is bonded to twelve equivalent Ge(1) atoms to form a mixture of face and corner-sharing PmGe12 cuboctahedra. There are six shorter (3.11 Å) and six longer (3.24 Å) Pm(1)-Ge(1) bond lengths. Ge(1) is bonded in a 10-coordinate geometry to four equivalent Pm(1) and six equivalent Ge(1) atoms. There are two shorter (2.68 Å) and four longer (2.96 Å) Ge(1)-Ge(1) bond lengths.