Materials Data on Ba2Cu(SBr)2 by Materials Project
Ba2Cu(SBr)2 is (La,Ba)CuO4-derived structured and crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. Ba2+ is bonded in a 9-coordinate geometry to four equivalent S2- and five equivalent Br1- atoms. All Ba–S bond lengths are 3.19 Å. There are four shorter (3.50 Å) and one longer (3.53 Å) Ba–Br bond lengths. Cu2+ is bonded to four equivalent S2- and two equivalent Br1- atoms to form distorted corner-sharing CuS4Br2 octahedra. The corner-sharing octahedral tilt angles are 0°. All Cu–S bond lengths are 2.35 Å. Both Cu–Br bond lengths are 3.29 Å. S2- is bonded to four equivalent Ba2+ and two equivalent Cu2+ atoms to form a mixture of edge, face, and corner-sharing SBa4Cu2 octahedra. The corner-sharing octahedral tilt angles are 0°. Br1- is bonded in a 6-coordinate geometry to five equivalent Ba2+ and one Cu2+ atom.