Materials Data on K2Cu(Cl2O)2 by Materials Project

Abstract

K2Cu(OCl2)2 crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. K is bonded in a body-centered cubic geometry to eight Cl atoms. There are four shorter (3.28 Å) and four longer (3.29 Å) K–Cl bond lengths. Cu is bonded in a 6-coordinate geometry to two O and four Cl atoms. Both Cu–O bond lengths are 1.75 Å. There are two shorter (2.22 Å) and two longer (2.87 Å) Cu–Cl bond lengths. There are three inequivalent O sites. In the first O site, O is bonded in a single-bond geometry to one Cu atom. In the second O site, O is bonded in a single-bond geometry to one Cu atom. In the third O site, O is bonded in a single-bond geometry to one Cu atom. The O–Cu bond length is 1.75 Å. There are two inequivalent Cl sites. In the first Cl site, Cl is bonded to four equivalent K and one Cu atom to form a mixture of distorted corner, edge, and face-sharing ClK4Cu square pyramids. In the second Cl site, Cl is bonded to four equivalent K and one Cu atom to form a mixture of corner, edge, and face-sharing ClK4Cu square pyramids.