In2P3H3O10 crystallizes in the monoclinic P2_1 space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to one O(10), one O(3), one O(4), one O(6), one O(7), and one O(8) atom to form InO6 octahedra that share corners with two equivalent P(1)HO3 tetrahedra, corners with two equivalent P(2)HO3 tetrahedra, corners with two equivalent P(3)HO3 tetrahedra, and  an edgeedge with one In(2)O6 octahedra. In the second In site, In(2) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(9) atom to form InO6 octahedra that share  a cornercorner with one P(1)HO3 tetrahedra, corners with two equivalent P(2)HO3 tetrahedra, corners with two equivalent P(3)HO3 tetrahedra, and  an edgeedge with one In(1)O6 octahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one H(3), one O(1), one O(3), and one O(8) atom to form distorted PHO3 tetrahedra that share  a cornercorner with one In(2)O6 octahedra and corners with two equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-48°. In the second P site, P(2) is bonded to one H(2), one O(10), one O(5), and one O(7) atom to form distorted PHO3 tetrahedra that share corners with two equivalent In(1)O6 octahedra and corners with two equivalent In(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-57°. In the third P site, P(3) is bonded to one H(1), one O(2), one O(4), and one O(6) atom to form distorted PHO3 tetrahedra that share corners with two equivalent In(1)O6 octahedra and corners with two equivalent In(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 31-54°. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one P(1) atom. There are ten inequivalent O sites. In the first O site, O(9) is bonded in a single-bond geometry to one In(2) atom. In the second O site, O(10) is bonded in a distorted trigonal planar geometry to one In(1), one In(2), and one P(2) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to one In(2) and one P(1) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(3) atom. In the fifth O site, O(3) is bonded in a bent 150 degrees geometry to one In(1) and one P(1) atom. In the sixth O site, O(4) is bonded in a bent 150 degrees geometry to one In(1) and one P(3) atom. In the seventh O site, O(5) is bonded in a distorted bent 120 degrees geometry to one In(2) and one P(2) atom. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to one In(1), one In(2), and one P(3) atom. In the ninth O site, O(7) is bonded in a bent 150 degrees geometry to one In(1) and one P(2) atom. In the tenth O site, O(8) is bonded in a bent 150 degrees geometry to one In(1) and one P(1) atom.
In2P3H3O10 crystallizes in the monoclinic P2_1 space group. There are two inequivalent In sites. In the first In site, In(1) is bonded to one O(10), one O(3), one O(4), one O(6), one O(7), and one O(8) atom to form InO6 octahedra that share corners with two equivalent P(1)HO3 tetrahedra, corners with two equivalent P(2)HO3 tetrahedra, corners with two equivalent P(3)HO3 tetrahedra, and  an edgeedge with one In(2)O6 octahedra. The In(1)-O(10) bond length is 2.27 Å. The In(1)-O(3) bond length is 2.14 Å. The In(1)-O(4) bond length is 2.14 Å. The In(1)-O(6) bond length is 2.26 Å. The In(1)-O(7) bond length is 2.11 Å. The In(1)-O(8) bond length is 2.14 Å. In the second In site, In(2) is bonded to one O(1), one O(10), one O(2), one O(5), one O(6), and one O(9) atom to form InO6 octahedra that share  a cornercorner with one P(1)HO3 tetrahedra, corners with two equivalent P(2)HO3 tetrahedra, corners with two equivalent P(3)HO3 tetrahedra, and  an edgeedge with one In(1)O6 octahedra. The In(2)-O(1) bond length is 2.11 Å. The In(2)-O(10) bond length is 2.21 Å. The In(2)-O(2) bond length is 2.12 Å. The In(2)-O(5) bond length is 2.11 Å. The In(2)-O(6) bond length is 2.27 Å. The In(2)-O(9) bond length is 2.28 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one H(3), one O(1), one O(3), and one O(8) atom to form distorted PHO3 tetrahedra that share  a cornercorner with one In(2)O6 octahedra and corners with two equivalent In(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 34-48°. The P(1)-H(3) bond length is 1.41 Å. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(3) bond length is 1.54 Å. The P(1)-O(8) bond length is 1.54 Å. In the second P site, P(2) is bonded to one H(2), one O(10), one O(5), and one O(7) atom to form distorted PHO3 tetrahedra that share corners with two equivalent In(1)O6 octahedra and corners with two equivalent In(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 39-57°. The P(2)-H(2) bond length is 1.41 Å. The P(2)-O(10) bond length is 1.58 Å. The P(2)-O(5) bond length is 1.53 Å. The P(2)-O(7) bond length is 1.52 Å. In the third P site, P(3) is bonded to one H(1), one O(2), one O(4), and one O(6) atom to form distorted PHO3 tetrahedra that share corners with two equivalent In(1)O6 octahedra and corners with two equivalent In(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 31-54°. The P(3)-H(1) bond length is 1.40 Å. The P(3)-O(2) bond length is 1.53 Å. The P(3)-O(4) bond length is 1.53 Å. The P(3)-O(6) bond length is 1.58 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(3) atom. In the second H site, H(2) is bonded in a single-bond geometry to one P(2) atom. In the third H site, H(3) is bonded in a single-bond geometry to one P(1) atom. There are ten inequivalent O sites. In the first O site, O(9) is bonded in a single-bond geometry to one In(2) atom. In the second O site, O(10) is bonded in a distorted trigonal planar geometry to one In(1), one In(2), and one P(2) atom. In the third O site, O(1) is bonded in a distorted bent 120 degrees geometry to one In(2) and one P(1) atom. In the fourth O site, O(2) is bonded in a distorted bent 150 degrees geometry to one In(2) and one P(3) atom. In the fifth O site, O(3) is bonded in a bent 150 degrees geometry to one In(1) and one P(1) atom. In the sixth O site, O(4) is bonded in a bent 150 degrees geometry to one In(1) and one P(3) atom. In the seventh O site, O(5) is bonded in a distorted bent 120 degrees geometry to one In(2) and one P(2) atom. In the eighth O site, O(6) is bonded in a distorted trigonal planar geometry to one In(1), one In(2), and one P(3) atom. In the ninth O site, O(7) is bonded in a bent 150 degrees geometry to one In(1) and one P(2) atom. In the tenth O site, O(8) is bonded in a bent 150 degrees geometry to one In(1) and one P(1) atom.