Sb2P3(HO3)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a rectangular see-saw-like geometry to one O(3), one O(5), one O(6), and one O(7) atom. In the second Sb site, Sb(2) is bonded to one O(1), one O(2), one O(4), one O(8), and one O(9) atom to form SbO5 square pyramids that share  a cornercorner with one P(2)HO3 tetrahedra, corners with two equivalent P(1)HO3 tetrahedra, and corners with two equivalent P(3)HO3 tetrahedra. There are three inequivalent P sites. In the first P site, P(1) is bonded to one H(1), one O(1), one O(2), and one O(3) atom to form distorted PHO3 tetrahedra that share corners with two equivalent Sb(2)O5 square pyramids. In the second P site, P(2) is bonded to one H(2), one O(4), one O(5), and one O(6) atom to form distorted PHO3 tetrahedra that share  a cornercorner with one Sb(2)O5 square pyramid. In the third P site, P(3) is bonded to one H(3), one O(7), one O(8), and one O(9) atom to form distorted PHO3 tetrahedra that share corners with two equivalent Sb(2)O5 square pyramids. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) 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(3) atom. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Sb(2) and one P(3) atom. In the second O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one P(1) atom. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one P(1) atom. In the fourth O site, O(3) is bonded in a 2-coordinate geometry to one Sb(1) and one P(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one P(2) atom. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one Sb(1) and one P(2) atom. In the seventh O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sb(1) and one P(2) atom. In the eighth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(3) atom. In the ninth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Sb(2) and one P(3) atom.
Sb2P3(HO3)3 crystallizes in the triclinic P-1 space group. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a rectangular see-saw-like geometry to one O(3), one O(5), one O(6), and one O(7) atom. The Sb(1)-O(3) bond length is 2.18 Å. The Sb(1)-O(5) bond length is 2.24 Å. The Sb(1)-O(6) bond length is 2.04 Å. The Sb(1)-O(7) bond length is 2.03 Å. In the second Sb site, Sb(2) is bonded to one O(1), one O(2), one O(4), one O(8), and one O(9) atom to form SbO5 square pyramids that share  a cornercorner with one P(2)HO3 tetrahedra, corners with two equivalent P(1)HO3 tetrahedra, and corners with two equivalent P(3)HO3 tetrahedra. The Sb(2)-O(1) bond length is 2.14 Å. The Sb(2)-O(2) bond length is 2.04 Å. The Sb(2)-O(4) bond length is 2.23 Å. The Sb(2)-O(8) bond length is 2.19 Å. The Sb(2)-O(9) bond length is 2.48 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one H(1), one O(1), one O(2), and one O(3) atom to form distorted PHO3 tetrahedra that share corners with two equivalent Sb(2)O5 square pyramids. The P(1)-H(1) bond length is 1.40 Å. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.56 Å. The P(1)-O(3) bond length is 1.54 Å. In the second P site, P(2) is bonded to one H(2), one O(4), one O(5), and one O(6) atom to form distorted PHO3 tetrahedra that share  a cornercorner with one Sb(2)O5 square pyramid. The P(2)-H(2) bond length is 1.41 Å. The P(2)-O(4) bond length is 1.53 Å. The P(2)-O(5) bond length is 1.53 Å. The P(2)-O(6) bond length is 1.57 Å. In the third P site, P(3) is bonded to one H(3), one O(7), one O(8), and one O(9) atom to form distorted PHO3 tetrahedra that share corners with two equivalent Sb(2)O5 square pyramids. The P(3)-H(3) bond length is 1.41 Å. The P(3)-O(7) bond length is 1.57 Å. The P(3)-O(8) bond length is 1.54 Å. The P(3)-O(9) bond length is 1.53 Å. There are three inequivalent H sites. In the first H site, H(1) is bonded in a single-bond geometry to one P(1) 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(3) atom. There are nine inequivalent O sites. In the first O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Sb(2) and one P(3) atom. In the second O site, O(1) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one P(1) atom. In the third O site, O(2) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one P(1) atom. In the fourth O site, O(3) is bonded in a 2-coordinate geometry to one Sb(1) and one P(1) atom. In the fifth O site, O(4) is bonded in a distorted bent 150 degrees geometry to one Sb(2) and one P(2) atom. In the sixth O site, O(5) is bonded in a 2-coordinate geometry to one Sb(1) and one P(2) atom. In the seventh O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Sb(1) and one P(2) atom. In the eighth O site, O(7) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(3) atom. In the ninth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Sb(2) and one P(3) atom.