P4Se3I2 is Indium-like structured and crystallizes in the tetragonal I-42d space group. The structure is zero-dimensional and consists of eight 3,6-diiodo-2,5,7-triselena-1,3,4,6-tetraphosphabicyclo[2.2.1]heptane molecules. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted trigonal non-coplanar geometry to one P(2), one Se(1), and one Se(2) atom. In the second P site, P(2) is bonded in a distorted trigonal non-coplanar geometry to one P(1), one Se(2), and one I(1) atom. There are two inequivalent Se sites. In the first Se site, Se(2) is bonded in a water-like geometry to one P(1) and one P(2) atom. In the second Se site, Se(1) is bonded in an L-shaped geometry to two equivalent P(1) atoms. I(1) is bonded in a single-bond geometry to one P(2) atom.
P4Se3I2 is Indium-like structured and crystallizes in the tetragonal I-42d space group. The structure is zero-dimensional and consists of eight 3,6-diiodo-2,5,7-triselena-1,3,4,6-tetraphosphabicyclo[2.2.1]heptane molecules. There are two inequivalent P sites. In the first P site, P(1) is bonded in a distorted trigonal non-coplanar geometry to one P(2), one Se(1), and one Se(2) atom. The P(1)-P(2) bond length is 2.20 Å. The P(1)-Se(1) bond length is 2.24 Å. The P(1)-Se(2) bond length is 2.27 Å. In the second P site, P(2) is bonded in a distorted trigonal non-coplanar geometry to one P(1), one Se(2), and one I(1) atom. The P(2)-Se(2) bond length is 2.28 Å. The P(2)-I(1) bond length is 2.48 Å. There are two inequivalent Se sites. In the first Se site, Se(2) is bonded in a water-like geometry to one P(1) and one P(2) atom. In the second Se site, Se(1) is bonded in an L-shaped geometry to two equivalent P(1) atoms. I(1) is bonded in a single-bond geometry to one P(2) atom.