Materials Data on Cs2RbBiBr6 by Materials Project
Cs2RbBiBr6 crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. Cs1+ is bonded to twelve equivalent Br1- atoms to form CsBr12 cuboctahedra that share corners with twelve equivalent CsBr12 cuboctahedra, faces with six equivalent CsBr12 cuboctahedra, faces with four equivalent RbBr6 octahedra, and faces with four equivalent BiBr6 octahedra. All Cs–Br bond lengths are 4.35 Å. Rb1+ is bonded to six equivalent Br1- atoms to form RbBr6 octahedra that share corners with six equivalent BiBr6 octahedra and faces with eight equivalent CsBr12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Rb–Br bond lengths are 3.28 Å. Bi3+ is bonded to six equivalent Br1- atoms to form BiBr6 octahedra that share corners with six equivalent RbBr6 octahedra and faces with eight equivalent CsBr12 cuboctahedra. The corner-sharing octahedral tilt angles are 0°. All Bi–Br bond lengths are 2.87 Å. Br1- is bonded in a linear geometry to four equivalent Cs1+, one Rb1+, and one Bi3+ atom.