As2P2S7 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four As2P2S7 clusters. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted water-like geometry to one S(2) and one S(3) atom. In the second As site, As(2) is bonded in a distorted water-like geometry to one S(4) and one S(5) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded to one S(1), one S(2), one S(4), and one S(6) atom to form corner-sharing PS4 tetrahedra. In the second P site, P(2) is bonded to one S(1), one S(3), one S(5), and one S(7) atom to form corner-sharing PS4 tetrahedra. There are seven inequivalent S sites. In the first S site, S(5) is bonded in a water-like geometry to one As(2) and one P(2) atom. In the second S site, S(6) is bonded in a single-bond geometry to one P(1) atom. In the third S site, S(7) is bonded in a single-bond geometry to one P(2) atom. In the fourth S site, S(1) is bonded in a water-like geometry to one P(1) and one P(2) atom. In the fifth S site, S(2) is bonded in a water-like geometry to one As(1) and one P(1) atom. In the sixth S site, S(3) is bonded in a water-like geometry to one As(1) and one P(2) atom. In the seventh S site, S(4) is bonded in a water-like geometry to one As(2) and one P(1) atom.
As2P2S7 is Indium-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is zero-dimensional and consists of four As2P2S7 clusters. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted water-like geometry to one S(2) and one S(3) atom. The As(1)-S(2) bond length is 2.26 Å. The As(1)-S(3) bond length is 2.26 Å. In the second As site, As(2) is bonded in a distorted water-like geometry to one S(4) and one S(5) atom. The As(2)-S(4) bond length is 2.27 Å. The As(2)-S(5) bond length is 2.27 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one S(1), one S(2), one S(4), and one S(6) atom to form corner-sharing PS4 tetrahedra. The P(1)-S(1) bond length is 2.11 Å. The P(1)-S(2) bond length is 2.07 Å. The P(1)-S(4) bond length is 2.07 Å. The P(1)-S(6) bond length is 1.93 Å. In the second P site, P(2) is bonded to one S(1), one S(3), one S(5), and one S(7) atom to form corner-sharing PS4 tetrahedra. The P(2)-S(1) bond length is 2.11 Å. The P(2)-S(3) bond length is 2.08 Å. The P(2)-S(5) bond length is 2.07 Å. The P(2)-S(7) bond length is 1.93 Å. There are seven inequivalent S sites. In the first S site, S(5) is bonded in a water-like geometry to one As(2) and one P(2) atom. In the second S site, S(6) is bonded in a single-bond geometry to one P(1) atom. In the third S site, S(7) is bonded in a single-bond geometry to one P(2) atom. In the fourth S site, S(1) is bonded in a water-like geometry to one P(1) and one P(2) atom. In the fifth S site, S(2) is bonded in a water-like geometry to one As(1) and one P(1) atom. In the sixth S site, S(3) is bonded in a water-like geometry to one As(1) and one P(2) atom. In the seventh S site, S(4) is bonded in a water-like geometry to one As(2) and one P(1) atom.