Materials Data on Ca2Cu(BrO)2 by Materials Project

Abstract

Ca2CuBr2O2 crystallizes in the tetragonal I4/mmm space group. The structure is two-dimensional and consists of two Ca2CuBr2O2 sheets oriented in the (0, 0, 1) direction. Ca2+ is bonded in a 8-coordinate geometry to four equivalent O2- and four equivalent Br1- atoms. All Ca–O bond lengths are 2.50 Å. All Ca–Br bond lengths are 3.10 Å. Cu2+ is bonded in a square co-planar geometry to four equivalent O2- and two equivalent Br1- atoms. All Cu–O bond lengths are 1.94 Å. Both Cu–Br bond lengths are 3.01 Å. O2- is bonded to four equivalent Ca2+ and two equivalent Cu2+ atoms to form a mixture of edge, face, and corner-sharing OCa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 0°. Br1- is bonded in a 5-coordinate geometry to four equivalent Ca2+ and one Cu2+ atom.