PaSb2 crystallizes in the tetragonal P4/nmm space group. Pa(1) is bonded in a 9-coordinate geometry to four equivalent Sb(2) and five equivalent Sb(1) atoms. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to five equivalent Pa(1) atoms to form a mixture of distorted corner and edge-sharing SbPa5 trigonal bipyramids. In the second Sb site, Sb(2) is bonded in a 8-coordinate geometry to four equivalent Pa(1) and four equivalent Sb(2) atoms.
PaSb2 crystallizes in the tetragonal P4/nmm space group. Pa(1) is bonded in a 9-coordinate geometry to four equivalent Sb(2) and five equivalent Sb(1) atoms. All Pa(1)-Sb(2) bond lengths are 3.24 Å. There are four shorter (3.16 Å) and one longer (3.18 Å) Pa(1)-Sb(1) bond length. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to five equivalent Pa(1) atoms to form a mixture of distorted corner and edge-sharing SbPa5 trigonal bipyramids. In the second Sb site, Sb(2) is bonded in a 8-coordinate geometry to four equivalent Pa(1) and four equivalent Sb(2) atoms. All Sb(2)-Sb(2) bond lengths are 3.06 Å.