(NaH2SeO4)2NiO2 crystallizes in the triclinic P-1 space group. The structure consists of one 12054-48-7 molecule inside a NaH2SeO4 framework. In the NaH2SeO4 framework, Na(1) is bonded in a 5-coordinate geometry to one H(2), one O(1), one O(5), and two equivalent O(3) atoms. There are two inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(1) and one O(4) atom. In the second H site, H(2) is bonded in a distorted single-bond geometry to one Na(1) and one H(2) atom. Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one H(1), and one Se(1) atom. In the second O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one Se(1) atom. In the third O site, O(4) is bonded in a distorted water-like geometry to one H(1) and one Se(1) atom. In the fourth O site, O(5) is bonded in a bent 120 degrees geometry to one Na(1) and one O(5) atom.
(NaH2SeO4)2NiO2 crystallizes in the triclinic P-1 space group. The structure consists of one 12054-48-7 molecule inside a NaH2SeO4 framework. In the NaH2SeO4 framework, Na(1) is bonded in a 5-coordinate geometry to one H(2), one O(1), one O(5), and two equivalent O(3) atoms. The Na(1)-H(2) bond length is 2.43 Å. The Na(1)-O(1) bond length is 2.35 Å. The Na(1)-O(5) bond length is 2.60 Å. There is one shorter (2.30 Å) and one longer (2.40 Å) Na(1)-O(3) bond length. There are two inequivalent H sites. In the first H site, H(1) is bonded in a distorted single-bond geometry to one O(1) and one O(4) atom. The H(1)-O(1) bond length is 1.67 Å. The H(1)-O(4) bond length is 1.02 Å. In the second H site, H(2) is bonded in a distorted single-bond geometry to one Na(1) and one H(2) atom. The H(2)-H(2) bond length is 0.75 Å. Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(3), and one O(4) atom. The Se(1)-O(1) bond length is 1.71 Å. The Se(1)-O(3) bond length is 1.70 Å. The Se(1)-O(4) bond length is 1.79 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Na(1), one H(1), and one Se(1) atom. In the second O site, O(3) is bonded in a distorted trigonal planar geometry to two equivalent Na(1) and one Se(1) atom. In the third O site, O(4) is bonded in a distorted water-like geometry to one H(1) and one Se(1) atom. In the fourth O site, O(5) is bonded in a bent 120 degrees geometry to one Na(1) and one O(5) atom. The O(5)-O(5) bond length is 1.24 Å.