Materials Data on RbCoO2 by Materials Project
RbCoO2 crystallizes in the orthorhombic Pbca space group. The structure is three-dimensional. there are two inequivalent Rb1+ sites. In the first Rb1+ site, Rb1+ is bonded in a 7-coordinate geometry to seven O2- atoms. There are a spread of Rb–O bond distances ranging from 2.87–3.43 Å. In the second Rb1+ site, Rb1+ is bonded in a 4-coordinate geometry to five O2- atoms. There are a spread of Rb–O bond distances ranging from 2.82–3.20 Å. There are two inequivalent Co3+ sites. In the first Co3+ site, Co3+ is bonded to four O2- atoms to form corner-sharing CoO4 tetrahedra. There are a spread of Co–O bond distances ranging from 1.81–1.96 Å. In the second Co3+ site, Co3+ is bonded to four O2- atoms to form corner-sharing CoO4 tetrahedra. There are a spread of Co–O bond distances ranging from 1.79–1.95 Å. There are four inequivalent O2- sites. In the first O2- site, O2- is bonded in a 2-coordinate geometry to three Rb1+ and two Co3+ atoms. In the second O2- site, O2- is bonded in a 2-coordinate geometry to three equivalent Rb1+ and two Co3+ atoms. In the third O2- site, O2- is bonded in a 2-coordinate geometry to three Rb1+ and two equivalent Co3+ atoms. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to three Rb1+ and two equivalent Co3+ atoms.