HNaZnP2O7 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 7-coordinate geometry to one H(1), one O(1), one O(2), one O(4), one O(7), and two equivalent O(3) atoms. Zn(1) is bonded to one O(1), one O(4), one O(5), one O(7), and two equivalent O(2) atoms to form distorted ZnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one Zn(1)O6 octahedra. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-59°. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-51°. H(1) is bonded in a linear geometry to one Na(1), one O(3), and one O(5) atom. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one P(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Zn(1), and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Na(1), one P(1), and one H(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Zn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Zn(1), one P(2), and one H(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one P(2) atom.
HNaZnP2O7 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a 7-coordinate geometry to one H(1), one O(1), one O(2), one O(4), one O(7), and two equivalent O(3) atoms. The Na(1)-H(1) bond length is 2.53 Å. The Na(1)-O(1) bond length is 2.54 Å. The Na(1)-O(2) bond length is 2.76 Å. The Na(1)-O(4) bond length is 2.37 Å. The Na(1)-O(7) bond length is 2.73 Å. There is one shorter (2.46 Å) and one longer (2.57 Å) Na(1)-O(3) bond length. Zn(1) is bonded to one O(1), one O(4), one O(5), one O(7), and two equivalent O(2) atoms to form distorted ZnO6 octahedra that share corners with three equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra, and  an edgeedge with one Zn(1)O6 octahedra. The Zn(1)-O(1) bond length is 2.12 Å. The Zn(1)-O(4) bond length is 2.05 Å. The Zn(1)-O(5) bond length is 2.39 Å. The Zn(1)-O(7) bond length is 2.07 Å. There is one shorter (2.13 Å) and one longer (2.24 Å) Zn(1)-O(2) bond length. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(6) atom to form PO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra and  a cornercorner with one P(2)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 45-59°. The P(1)-O(1) bond length is 1.52 Å. The P(1)-O(2) bond length is 1.55 Å. The P(1)-O(3) bond length is 1.54 Å. The P(1)-O(6) bond length is 1.62 Å. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with three equivalent Zn(1)O6 octahedra and  a cornercorner with one P(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 39-51°. The P(2)-O(4) bond length is 1.52 Å. The P(2)-O(5) bond length is 1.57 Å. The P(2)-O(6) bond length is 1.61 Å. The P(2)-O(7) bond length is 1.51 Å. H(1) is bonded in a linear geometry to one Na(1), one O(3), and one O(5) atom. The H(1)-O(3) bond length is 1.35 Å. The H(1)-O(5) bond length is 1.09 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one P(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), two equivalent Zn(1), and one P(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to two equivalent Na(1), one P(1), and one H(1) atom. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Na(1), one Zn(1), and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Zn(1), one P(2), and one H(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(1), one Zn(1), and one P(2) atom.