DOE OSTI2020
Rb2(PSe2)3 crystallizes in the orthorhombic Pca2_1 space group. The structure is three-dimensional. there are four inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 11-coordinate geometry to eleven Se+1.83- atoms. There are a spread of Rb–Se bond distances ranging from 3.54–4.16 Å. In the second Rb1+ site, Rb1+ is bonded in a 9-coordinate geometry to nine Se+1.83- atoms. There are a spread of Rb–Se bond distances ranging from 3.79–4.08 Å. In the third Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight Se+1.83- atoms. There are a spread of Rb–Se bond distances ranging from 3.57–4.03 Å. In the fourth Rb1+ site, Rb1+ is bonded in a 7-coordinate geometry to seven Se+1.83- atoms. There are a spread of Rb–Se bond distances ranging from 3.63–3.85 Å. There are six inequivalent P3+ sites. In the first P3+ site, P3+ is bonded in a trigonal non-coplanar geometry to three Se+1.83- atoms. There are two shorter (2.16 Å) and one longer (2.32 Å) P–Se bond lengths. In the second P3+ site, P3+ is bonded in an L-shaped geometry to two Se+1.83- atoms. There are one shorter (2.31 Å) and one longer (2.33 Å) P–Se bond lengths. In the third P3+ site, P3+ is bonded in an L-shaped geometry to two Se+1.83- atoms. There are one shorter (2.31 Å) and one longer (2.33 Å) P–Se bond lengths. In the fourth P3+ site, P3+ is bonded in a trigonal non-coplanar geometry to three Se+1.83- atoms. There are a spread of P–Se bond distances ranging from 2.15–2.33 Å. In the fifth P3+ site, P3+ is bonded in a trigonal non-coplanar geometry to three Se+1.83- atoms. There are a spread of P–Se bond distances ranging from 2.15–2.33 Å. In the sixth P3+ site, P3+ is bonded in a trigonal non-coplanar geometry to three Se+1.83- atoms. There are two shorter (2.16 Å) and one longer (2.33 Å) P–Se bond lengths. There are twelve inequivalent Se+1.83- sites. In the first Se+1.83- site, Se+1.83- is bonded in a 1-coordinate geometry to three Rb1+ and one P3+ atom. In the second Se+1.83- site, Se+1.83- is bonded in a 1-coordinate geometry to four Rb1+ and one P3+ atom. In the third Se+1.83- site, Se+1.83- is bonded in a water-like geometry to two P3+ atoms. In the fourth Se+1.83- site, Se+1.83- is bonded in a water-like geometry to one Rb1+ and two P3+ atoms. In the fifth Se+1.83- site, Se+1.83- is bonded in a 1-coordinate geometry to three Rb1+ and one P3+ atom. In the sixth Se+1.83- site, Se+1.83- is bonded in a distorted single-bond geometry to four Rb1+ and one P3+ atom. In the seventh Se+1.83- site, Se+1.83- is bonded in a 1-coordinate geometry to four Rb1+ and one P3+ atom. In the eighth Se+1.83- site, Se+1.83- is bonded in a distorted water-like geometry to two Rb1+ and two P3+ atoms. In the ninth Se+1.83- site, Se+1.83- is bonded in a 2-coordinate geometry to two Rb1+ and two P3+ atoms. In the tenth Se+1.83- site, Se+1.83- is bonded in a distorted single-bond geometry to four Rb1+ and one P3+ atom. In the eleventh Se+1.83- site, Se+1.83- is bonded in a distorted single-bond geometry to four Rb1+ and one P3+ atom. In the twelfth Se+1.83- site, Se+1.83- is bonded in a distorted single-bond geometry to four Rb1+ and one P3+ atom.