Materials Data on CuSe3Br by Materials Project
CuBrSe3 crystallizes in the orthorhombic Pmna space group. The structure is one-dimensional and consists of four hydrobromic acid molecules and two CuSe3 ribbons oriented in the (0, 0, 1) direction. In each CuSe3 ribbon, Cu1+ is bonded in a water-like geometry to two equivalent Se2- atoms. Both Cu–Se bond lengths are 2.39 Å. There are two inequivalent Se2- sites. In the first Se2- site, Se2- is bonded in a distorted single-bond geometry to one Cu1+ and one Se2- atom. The Se–Se bond length is 2.38 Å. In the second Se2- site, Se2- is bonded in a distorted water-like geometry to two equivalent Se2- atoms.
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