Materials Data on Ca(FeO2)2 by Materials Project

CaFe2O4 crystallizes in the orthorhombic Cmmm space group. The structure is three-dimensional. Ca2+ is bonded in a body-centered cubic geometry to eight O2- atoms. All Ca–O bond lengths are 2.47 Å. Fe3+ is bonded in a square co-planar geometry to four O2- atoms. All Fe–O bond lengths are 1.92 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ca2+ and two equivalent Fe3+ atoms. In the second O2- site, O2- is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ca2+ and two equivalent Fe3+ atoms.