UP2 crystallizes in the tetragonal P4/nmm space group. U(1) is bonded in a 9-coordinate geometry to four equivalent P(2) and five equivalent P(1) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded to five equivalent U(1) atoms to form a mixture of distorted edge and corner-sharing PU5 trigonal bipyramids. In the second P site, P(2) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent P(2) atoms.
UP2 crystallizes in the tetragonal P4/nmm space group. U(1) is bonded in a 9-coordinate geometry to four equivalent P(2) and five equivalent P(1) atoms. All U(1)-P(2) bond lengths are 2.92 Å. There are four shorter (2.76 Å) and one longer (2.81 Å) U(1)-P(1) bond length. There are two inequivalent P sites. In the first P site, P(1) is bonded to five equivalent U(1) atoms to form a mixture of distorted edge and corner-sharing PU5 trigonal bipyramids. In the second P site, P(2) is bonded in a 8-coordinate geometry to four equivalent U(1) and four equivalent P(2) atoms. All P(2)-P(2) bond lengths are 2.69 Å.