Materials Data on CoP2 by Materials Project

Abstract

CoP2 is Marcasite-like structured and crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Co2+ is bonded to six P1- atoms to form CoP6 octahedra that share corners with eight equivalent CoP6 octahedra, corners with six PCo3P tetrahedra, and edges with two equivalent CoP6 octahedra. The corner-sharing octahedra tilt angles range from 54–59°. There are a spread of Co–P bond distances ranging from 2.20–2.29 Å. There are two inequivalent P1- sites. In the first P1- site, P1- is bonded to three equivalent Co2+ and one P1- atom to form distorted PCo3P tetrahedra that share corners with three equivalent CoP6 octahedra, corners with thirteen PCo3P tetrahedra, and an edgeedge with one PCo3P tetrahedra. The corner-sharing octahedra tilt angles range from 73–77°. The P–P bond length is 2.23 Å. In the second P1- site, P1- is bonded to three equivalent Co2+ and one P1- atom to form distorted PCo3P tetrahedra that share corners with three equivalent CoP6 octahedra, corners with thirteen PCo3P tetrahedra, and an edgeedge with one PCo3P tetrahedra. The corner-sharing octahedra tilt angles range from 68–72°.