NiPO4 crystallizes in the monoclinic P2_1/c space group. Ni(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NiO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with four equivalent Ni(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ni(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ni(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ni(1) and one P(1) atom.
NiPO4 crystallizes in the monoclinic P2_1/c space group. Ni(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form NiO4 tetrahedra that share corners with four equivalent P(1)O4 tetrahedra. The Ni(1)-O(1) bond length is 1.85 Å. The Ni(1)-O(2) bond length is 1.85 Å. The Ni(1)-O(3) bond length is 1.85 Å. The Ni(1)-O(4) bond length is 1.86 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with four equivalent Ni(1)O4 tetrahedra. The P(1)-O(1) bond length is 1.55 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.55 Å. The P(1)-O(4) bond length is 1.55 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to one Ni(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Ni(1) and one P(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Ni(1) and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Ni(1) and one P(1) atom.