Na2Ni3P2(HO5)2 crystallizes in the monoclinic C2/m space group. Na(1) is bonded in a 8-coordinate geometry to one H(1), one O(1), two equivalent O(2), and four equivalent O(4) atoms. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form NiO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra and edges with four equivalent Ni(2)O6 octahedra. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. P(1) is bonded to one O(1), one O(4), and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with two equivalent Ni(1)O6 octahedra and corners with four equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. H(1) is bonded in a single-bond geometry to one Na(1) and one O(3) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), two equivalent Ni(2), and one P(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Ni(1), one Ni(2), and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Ni(1), two equivalent Ni(2), and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to four equivalent Na(1) and one P(1) atom.
Na2Ni3P2(HO5)2 crystallizes in the monoclinic C2/m space group. Na(1) is bonded in a 8-coordinate geometry to one H(1), one O(1), two equivalent O(2), and four equivalent O(4) atoms. The Na(1)-H(1) bond length is 2.68 Å. The Na(1)-O(1) bond length is 2.57 Å. Both Na(1)-O(2) bond lengths are 2.62 Å. There are a spread of Na(1)-O(4) bond distances ranging from 2.52-2.91 Å. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form NiO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra and edges with four equivalent Ni(2)O6 octahedra. Both Ni(1)-O(3) bond lengths are 1.96 Å. All Ni(1)-O(2) bond lengths are 2.14 Å. In the second Ni site, Ni(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NiO6 octahedra that share corners with four equivalent P(1)O4 tetrahedra, edges with two equivalent Ni(1)O6 octahedra, and edges with two equivalent Ni(2)O6 octahedra. Both Ni(2)-O(1) bond lengths are 2.13 Å. Both Ni(2)-O(2) bond lengths are 2.10 Å. Both Ni(2)-O(3) bond lengths are 2.00 Å. P(1) is bonded to one O(1), one O(4), and two equivalent O(2) atoms to form PO4 tetrahedra that share corners with two equivalent Ni(1)O6 octahedra and corners with four equivalent Ni(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. The P(1)-O(1) bond length is 1.57 Å. The P(1)-O(4) bond length is 1.54 Å. Both P(1)-O(2) bond lengths are 1.57 Å. H(1) is bonded in a single-bond geometry to one Na(1) and one O(3) atom. The H(1)-O(3) bond length is 0.98 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted rectangular see-saw-like geometry to one Na(1), two equivalent Ni(2), and one P(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Ni(1), one Ni(2), and one P(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Ni(1), two equivalent Ni(2), and one H(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to four equivalent Na(1) and one P(1) atom.