Materials Data on CuGe2P3 by Materials Project

Abstract

CuGe2P3 crystallizes in the orthorhombic Pmm2 space group. The structure is two-dimensional and consists of one CuGe2P3 sheet oriented in the (0, 0, 1) direction. Cu1+ is bonded in a bent 150 degrees geometry to two equivalent P3- atoms. Both Cu–P bond lengths are 2.13 Å. There are two inequivalent Ge4+ sites. In the first Ge4+ site, Ge4+ is bonded to four P3- atoms to form corner-sharing GeP4 tetrahedra. There are two shorter (2.35 Å) and two longer (2.40 Å) Ge–P bond lengths. In the second Ge4+ site, Ge4+ is bonded to four P3- atoms to form corner-sharing GeP4 tetrahedra. All Ge–P bond lengths are 2.40 Å. There are three inequivalent P3- sites. In the first P3- site, P3- is bonded to four Ge4+ atoms to form corner-sharing PGe4 tetrahedra. In the second P3- site, P3- is bonded in a bent 120 degrees geometry to two equivalent Ge4+ atoms. In the third P3- site, P3- is bonded to two equivalent Cu1+ and two equivalent Ge4+ atoms to form distorted corner-sharing PCu2Ge2 tetrahedra.