PaAl3 crystallizes in the hexagonal P6_3/mmc space group. Pa(1) is bonded to twelve equivalent Al(1) atoms to form a mixture of distorted corner and face-sharing PaAl12 cuboctahedra. Al(1) is bonded in a 10-coordinate geometry to four equivalent Pa(1) and six equivalent Al(1) atoms.
PaAl3 crystallizes in the hexagonal P6_3/mmc space group. Pa(1) is bonded to twelve equivalent Al(1) atoms to form a mixture of distorted corner and face-sharing PaAl12 cuboctahedra. There are six shorter (3.04 Å) and six longer (3.15 Å) Pa(1)-Al(1) bond lengths. Al(1) is bonded in a 10-coordinate geometry to four equivalent Pa(1) and six equivalent Al(1) atoms. There are two shorter (2.76 Å) and four longer (2.77 Å) Al(1)-Al(1) bond lengths.