Materials Data on Rb4P2Se9 by Materials Project
Rb4P2Se9 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight Se+1.33- atoms. There are a spread of Rb–Se bond distances ranging from 3.54–3.81 Å. In the second Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight Se+1.33- atoms. There are a spread of Rb–Se bond distances ranging from 3.68–3.91 Å. P4+ is bonded in a tetrahedral geometry to four Se+1.33- atoms. There are a spread of P–Se bond distances ranging from 2.18–2.37 Å. There are five inequivalent Se+1.33- sites. In the first Se+1.33- site, Se+1.33- is bonded in a 4-coordinate geometry to two equivalent Rb1+ and two equivalent Se+1.33- atoms. Both Se–Se bond lengths are 2.38 Å. In the second Se+1.33- site, Se+1.33- is bonded in a distorted single-bond geometry to two Rb1+, one P4+, and one Se+1.33- atom. In the third Se+1.33- site, Se+1.33- is bonded in a 1-coordinate geometry to four Rb1+ and one P4+ atom. In the fourth Se+1.33- site, Se+1.33- is bonded in a 1-coordinate geometry to four Rb1+ and one P4+ atom. In the fifth Se+1.33- site, Se+1.33- is bonded in a 1-coordinate geometry to five Rb1+ and one P4+ atom.