Materials Data on Y(CoO2)2 by Materials Project
Y(CoO2)2 crystallizes in the monoclinic C2/c space group. The structure is three-dimensional. Y3+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are four shorter (2.36 Å) and four longer (2.42 Å) Y–O bond lengths. There are two inequivalent Co+2.50+ sites. In the first Co+2.50+ site, Co+2.50+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.85 Å) and two longer (1.92 Å) Co–O bond length. In the second Co+2.50+ site, Co+2.50+ is bonded in a square co-planar geometry to four O2- atoms. There is two shorter (1.85 Å) and two longer (1.92 Å) Co–O bond length. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded to two equivalent Y3+ and two Co+2.50+ atoms to form a mixture of distorted edge and corner-sharing OY2Co2 tetrahedra. In the second O2- site, O2- is bonded to two equivalent Y3+ and two Co+2.50+ atoms to form a mixture of distorted edge and corner-sharing OY2Co2 tetrahedra.