Materials Data on Rb2SbF5 by Materials Project
Rb2SbF5 is Pb (Zr_0.50 Ti_0.48) O_3-like structured and crystallizes in the orthorhombic Pnma space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 8-coordinate geometry to eight F1- atoms. There are a spread of Rb–F bond distances ranging from 2.79–3.27 Å. In the second Rb1+ site, Rb1+ is bonded in a 9-coordinate geometry to seven F1- atoms. There are a spread of Rb–F bond distances ranging from 2.76–3.23 Å. Sb3+ is bonded to six F1- atoms to form corner-sharing SbF6 octahedra. The corner-sharing octahedral tilt angles are 0°. There are a spread of Sb–F bond distances ranging from 2.09–2.36 Å. There are four inequivalent F1- sites. In the first F1- site, F1- is bonded to four Rb1+ and one Sb3+ atom to form distorted corner-sharing FRb4Sb square pyramids. In the second F1- site, F1- is bonded in a 1-coordinate geometry to three Rb1+ and one Sb3+ atom. In the third F1- site, F1- is bonded in a distorted linear geometry to two equivalent Rb1+ and two equivalent Sb3+ atoms. In the fourth F1- site, F1- is bonded in a 4-coordinate geometry to three Rb1+ and one Sb3+ atom.