KTmBr3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. K(1) is bonded in a 8-coordinate geometry to two equivalent Br(2) and six equivalent Br(1) atoms. Tm(1) is bonded to two equivalent Br(2) and four equivalent Br(1) atoms to form corner-sharing TmBr6 octahedra. The corner-sharing octahedral tilt angles range from 29-32°. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 5-coordinate geometry to three equivalent K(1) and two equivalent Tm(1) atoms. In the second Br site, Br(2) is bonded to two equivalent K(1) and two equivalent Tm(1) atoms to form distorted corner-sharing BrK2Tm2 trigonal pyramids.
KTmBr3 is Orthorhombic Perovskite structured and crystallizes in the orthorhombic Pnma space group. K(1) is bonded in a 8-coordinate geometry to two equivalent Br(2) and six equivalent Br(1) atoms. There is one shorter (3.34 Å) and one longer (3.38 Å) K(1)-Br(2) bond length. There are a spread of K(1)-Br(1) bond distances ranging from 3.41-3.81 Å. Tm(1) is bonded to two equivalent Br(2) and four equivalent Br(1) atoms to form corner-sharing TmBr6 octahedra. The corner-sharing octahedral tilt angles range from 29-32°. Both Tm(1)-Br(2) bond lengths are 2.84 Å. There are two shorter (2.84 Å) and two longer (2.85 Å) Tm(1)-Br(1) bond lengths. There are two inequivalent Br sites. In the first Br site, Br(1) is bonded in a 5-coordinate geometry to three equivalent K(1) and two equivalent Tm(1) atoms. In the second Br site, Br(2) is bonded to two equivalent K(1) and two equivalent Tm(1) atoms to form distorted corner-sharing BrK2Tm2 trigonal pyramids.