RbTmI3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent I(2) and six equivalent I(1) atoms. Tm(1) is bonded to two equivalent I(2) and four equivalent I(1) atoms to form corner-sharing TmI6 octahedra. The corner-sharing octahedral tilt angles range from 26-27°. There are two inequivalent I sites. In the first I site, I(1) is bonded in a 5-coordinate geometry to three equivalent Rb(1) and two equivalent Tm(1) atoms. In the second I site, I(2) is bonded in a distorted square co-planar geometry to two equivalent Rb(1) and two equivalent Tm(1) atoms.
RbTmI3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. Rb(1) is bonded in a 8-coordinate geometry to two equivalent I(2) and six equivalent I(1) atoms. Both Rb(1)-I(2) bond lengths are 3.73 Å. There are a spread of Rb(1)-I(1) bond distances ranging from 3.79-4.12 Å. Tm(1) is bonded to two equivalent I(2) and four equivalent I(1) atoms to form corner-sharing TmI6 octahedra. The corner-sharing octahedral tilt angles range from 26-27°. Both Tm(1)-I(2) bond lengths are 3.07 Å. There are two shorter (3.06 Å) and two longer (3.07 Å) Tm(1)-I(1) bond lengths. There are two inequivalent I sites. In the first I site, I(1) is bonded in a 5-coordinate geometry to three equivalent Rb(1) and two equivalent Tm(1) atoms. In the second I site, I(2) is bonded in a distorted square co-planar geometry to two equivalent Rb(1) and two equivalent Tm(1) atoms.