Materials Data on KAuBr4 by Materials Project
KAuBr4 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. K1+ is bonded in a 9-coordinate geometry to nine Br1- atoms. There are a spread of K–Br bond distances ranging from 3.42–3.95 Å. There are two inequivalent Au3+ sites. In the first Au3+ site, Au3+ is bonded in a square co-planar geometry to four Br1- atoms. All Au–Br bond lengths are 2.48 Å. In the second Au3+ site, Au3+ is bonded in a square co-planar geometry to four Br1- atoms. All Au–Br bond lengths are 2.48 Å. There are four inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a 2-coordinate geometry to two equivalent K1+ and one Au3+ atom. In the second Br1- site, Br1- is bonded in a 3-coordinate geometry to two equivalent K1+ and one Au3+ atom. In the third Br1- site, Br1- is bonded in a 4-coordinate geometry to three equivalent K1+ and one Au3+ atom. In the fourth Br1- site, Br1- is bonded in a 3-coordinate geometry to two equivalent K1+ and one Au3+ atom.