Materials Data on RbCuSe4 by Materials Project
RbCuSe4 crystallizes in the orthorhombic P2_12_12_1 space group. The structure is three-dimensional. Rb1+ is bonded in a 11-coordinate geometry to eleven Se+0.50- atoms. There are a spread of Rb–Se bond distances ranging from 3.54–4.08 Å. Cu1+ is bonded to four Se+0.50- atoms to form distorted corner-sharing CuSe4 tetrahedra. There are a spread of Cu–Se bond distances ranging from 2.42–2.48 Å. There are four inequivalent Se+0.50- sites. In the first Se+0.50- site, Se+0.50- is bonded in a distorted single-bond geometry to three equivalent Rb1+, one Cu1+, and one Se+0.50- atom. The Se–Se bond length is 2.40 Å. In the second Se+0.50- site, Se+0.50- is bonded in a 2-coordinate geometry to three equivalent Rb1+ and two equivalent Cu1+ atoms. In the third Se+0.50- site, Se+0.50- is bonded in a 1-coordinate geometry to three equivalent Rb1+, one Cu1+, and one Se+0.50- atom. The Se–Se bond length is 2.44 Å. In the fourth Se+0.50- site, Se+0.50- is bonded in a 4-coordinate geometry to two equivalent Rb1+ and two Se+0.50- atoms.