Materials Data on KCoPCO7 by Materials Project
KCoCPO7 crystallizes in the monoclinic P2_1 space group. The structure is three-dimensional. K1+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of K–O bond distances ranging from 2.56–3.31 Å. Co4+ is bonded to six O2- atoms to form CoO6 octahedra that share corners with four equivalent PO4 tetrahedra. There are a spread of Co–O bond distances ranging from 1.85–1.98 Å. C4+ is bonded in a trigonal planar geometry to three O2- atoms. There are a spread of C–O bond distances ranging from 1.23–1.33 Å. P5+ is bonded to four O2- atoms to form PO4 tetrahedra that share corners with four equivalent CoO6 octahedra. The corner-sharing octahedra tilt angles range from 26–45°. There are a spread of P–O bond distances ranging from 1.52–1.57 Å. There are seven inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+ and one C4+ atom. In the second O2- site, O2- is bonded in a distorted L-shaped geometry to one K1+, one Co4+, and one C4+ atom. In the third O2- site, O2- is bonded in a 3-coordinate geometry to one K1+, one Co4+, and one C4+ atom. In the fourth O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Co4+, and one P5+ atom. In the fifth O2- site, O2- is bonded in a 2-coordinate geometry to two equivalent K1+, one Co4+, and one P5+ atom. In the sixth O2- site, O2- is bonded in a distorted bent 150 degrees geometry to one K1+, one Co4+, and one P5+ atom. In the seventh O2- site, O2- is bonded in a 2-coordinate geometry to one K1+, one Co4+, and one P5+ atom.