NaInH6(SeO4)2 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a square co-planar geometry to one O(1), one O(2), one O(3), and one O(5) atom. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent H(2), two equivalent H(5), and two equivalent O(4) atoms to form InH4O2 octahedra that share corners with two equivalent Se(1)O4 tetrahedra. In the second In site, In(2) is bonded to two equivalent H(3), two equivalent H(6), and two equivalent O(6) atoms to form InH4O2 octahedra that share corners with two equivalent Se(2)O4 tetrahedra. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) and one O(7) atom. In the second H site, H(2) is bonded in a single-bond geometry to one In(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one In(2) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(6) and one O(8) atom. In the fifth H site, H(5) is bonded in a single-bond geometry to one In(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one In(2) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form SeO4 tetrahedra that share  a cornercorner with one In(1)H4O2 octahedra. The corner-sharing octahedral tilt angles are 55°. In the second Se site, Se(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form SeO4 tetrahedra that share  a cornercorner with one In(2)H4O2 octahedra. The corner-sharing octahedral tilt angles are 54°. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Na(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one Se(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one Se(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one In(1), one H(1), and one Se(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Na(1) and one Se(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one In(2), one H(4), and one Se(2) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one H(1) and one Se(1) atom. In the eighth O site, O(8) is bonded in a water-like geometry to one H(4) and one Se(2) atom.
NaInH6(SeO4)2 crystallizes in the triclinic P-1 space group. Na(1) is bonded in a square co-planar geometry to one O(1), one O(2), one O(3), and one O(5) atom. The Na(1)-O(1) bond length is 2.43 Å. The Na(1)-O(2) bond length is 2.44 Å. The Na(1)-O(3) bond length is 2.43 Å. The Na(1)-O(5) bond length is 2.42 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent H(2), two equivalent H(5), and two equivalent O(4) atoms to form InH4O2 octahedra that share corners with two equivalent Se(1)O4 tetrahedra. Both In(1)-H(2) bond lengths are 1.71 Å. Both In(1)-H(5) bond lengths are 1.70 Å. Both In(1)-O(4) bond lengths are 2.39 Å. In the second In site, In(2) is bonded to two equivalent H(3), two equivalent H(6), and two equivalent O(6) atoms to form InH4O2 octahedra that share corners with two equivalent Se(2)O4 tetrahedra. Both In(2)-H(3) bond lengths are 1.71 Å. Both In(2)-H(6) bond lengths are 1.71 Å. Both In(2)-O(6) bond lengths are 2.37 Å. There are six inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one O(4) and one O(7) atom. The H(1)-O(4) bond length is 1.73 Å. The H(1)-O(7) bond length is 1.01 Å. In the second H site, H(2) is bonded in a single-bond geometry to one In(1) atom. In the third H site, H(3) is bonded in a single-bond geometry to one In(2) atom. In the fourth H site, H(4) is bonded in a linear geometry to one O(6) and one O(8) atom. The H(4)-O(6) bond length is 1.63 Å. The H(4)-O(8) bond length is 1.02 Å. In the fifth H site, H(5) is bonded in a single-bond geometry to one In(1) atom. In the sixth H site, H(6) is bonded in a single-bond geometry to one In(2) atom. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded to one O(1), one O(2), one O(4), and one O(7) atom to form SeO4 tetrahedra that share  a cornercorner with one In(1)H4O2 octahedra. The corner-sharing octahedral tilt angles are 55°. The Se(1)-O(1) bond length is 1.65 Å. The Se(1)-O(2) bond length is 1.64 Å. The Se(1)-O(4) bond length is 1.69 Å. The Se(1)-O(7) bond length is 1.78 Å. In the second Se site, Se(2) is bonded to one O(3), one O(5), one O(6), and one O(8) atom to form SeO4 tetrahedra that share  a cornercorner with one In(2)H4O2 octahedra. The corner-sharing octahedral tilt angles are 54°. The Se(2)-O(3) bond length is 1.65 Å. The Se(2)-O(5) bond length is 1.64 Å. The Se(2)-O(6) bond length is 1.69 Å. The Se(2)-O(8) bond length is 1.77 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one Na(1) and one Se(1) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one Se(1) atom. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one Na(1) and one Se(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one In(1), one H(1), and one Se(1) atom. In the fifth O site, O(5) is bonded in a bent 120 degrees geometry to one Na(1) and one Se(2) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one In(2), one H(4), and one Se(2) atom. In the seventh O site, O(7) is bonded in a water-like geometry to one H(1) and one Se(1) atom. In the eighth O site, O(8) is bonded in a water-like geometry to one H(4) and one Se(2) atom.