Th(NiP)2 crystallizes in the tetragonal P4/nmm space group. Th(1) is bonded in a 18-coordinate geometry to four equivalent Ni(2), five equivalent Ni(1), four equivalent P(2), and five equivalent P(1) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 5-coordinate geometry to five equivalent Th(1), one P(1), and four equivalent P(2) atoms. In the second Ni site, Ni(2) is bonded in a 4-coordinate geometry to four equivalent Th(1) and four equivalent P(1) atoms. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 5-coordinate geometry to five equivalent Th(1), one Ni(1), and four equivalent Ni(2) atoms. In the second P site, P(2) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Ni(1) atoms.
Th(NiP)2 crystallizes in the tetragonal P4/nmm space group. Th(1) is bonded in a 18-coordinate geometry to four equivalent Ni(2), five equivalent Ni(1), four equivalent P(2), and five equivalent P(1) atoms. All Th(1)-Ni(2) bond lengths are 3.00 Å. There are four shorter (3.15 Å) and one longer (3.26 Å) Th(1)-Ni(1) bond length. All Th(1)-P(2) bond lengths are 3.05 Å. There are four shorter (3.07 Å) and one longer (3.34 Å) Th(1)-P(1) bond length. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 5-coordinate geometry to five equivalent Th(1), one P(1), and four equivalent P(2) atoms. The Ni(1)-P(1) bond length is 2.34 Å. All Ni(1)-P(2) bond lengths are 2.27 Å. In the second Ni site, Ni(2) is bonded in a 4-coordinate geometry to four equivalent Th(1) and four equivalent P(1) atoms. All Ni(2)-P(1) bond lengths are 2.33 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded in a 5-coordinate geometry to five equivalent Th(1), one Ni(1), and four equivalent Ni(2) atoms. In the second P site, P(2) is bonded in a 8-coordinate geometry to four equivalent Th(1) and four equivalent Ni(1) atoms.