Materials Data on CsGaSe3 by Materials Project
CsGaSe3 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Cs1+ is bonded in a 11-coordinate geometry to eleven Se+1.33- atoms. There are a spread of Cs–Se bond distances ranging from 3.79–4.35 Å. Ga3+ is bonded to four Se+1.33- atoms to form corner-sharing GaSe4 tetrahedra. There are a spread of Ga–Se bond distances ranging from 2.42–2.46 Å. There are three inequivalent Se+1.33- sites. In the first Se+1.33- site, Se+1.33- is bonded in a distorted single-bond geometry to four equivalent Cs1+ and one Ga3+ atom. In the second Se+1.33- site, Se+1.33- is bonded in a distorted L-shaped geometry to four equivalent Cs1+ and two equivalent Ga3+ atoms. In the third Se+1.33- site, Se+1.33- is bonded in a distorted single-bond geometry to three equivalent Cs1+ and one Ga3+ atom.