Materials Data on CsTlBr3 by Materials Project
CsTlBr3 is (Cubic) Perovskite structured and crystallizes in the triclinic P1 space group. The structure is three-dimensional. Cs is bonded to twelve Br atoms to form CsBr12 cuboctahedra that share corners with twelve equivalent CsBr12 cuboctahedra, faces with six equivalent CsBr12 cuboctahedra, and faces with eight equivalent TlBr6 octahedra. There are a spread of Cs–Br bond distances ranging from 4.09–4.21 Å. Tl is bonded to six Br atoms to form TlBr6 octahedra that share corners with six equivalent TlBr6 octahedra and faces with eight equivalent CsBr12 cuboctahedra. The corner-sharing octahedra tilt angles range from 1–3°. There are three shorter (2.93 Å) and three longer (2.94 Å) Tl–Br bond lengths. There are three inequivalent Br sites. In the first Br site, Br is bonded to four equivalent Cs and two equivalent Tl atoms to form a mixture of distorted face, edge, and corner-sharing BrCs4Tl2 octahedra. The corner-sharing octahedra tilt angles range from 1–62°. In the second Br site, Br is bonded to four equivalent Cs and two equivalent Tl atoms to form a mixture of distorted face, edge, and corner-sharing BrCs4Tl2 octahedra. The corner-sharing octahedra tilt angles range from 2–62°. In the third Br site, Br is bonded to four equivalent Cs and two equivalent Tl atoms to form a mixture of distorted face, edge, and corner-sharing BrCs4Tl2 octahedra. The corner-sharing octahedra tilt angles range from 1–61°.