Materials Data on Re3Br9O2 by Materials Project
Re3O2Br9 crystallizes in the monoclinic C2/m space group. The structure is three-dimensional. there are two inequivalent Re+4.33+ sites. In the first Re+4.33+ site, Re+4.33+ is bonded in a distorted single-bond geometry to one O2- and four Br1- atoms. The Re–O bond length is 1.75 Å. There are a spread of Re–Br bond distances ranging from 2.48–2.55 Å. In the second Re+4.33+ site, Re+4.33+ is bonded to five Br1- atoms to form a mixture of distorted edge and corner-sharing ReBr5 square pyramids. There are a spread of Re–Br bond distances ranging from 2.42–2.90 Å. There are two inequivalent O2- sites. In the first O2- site, O2- is bonded in a single-bond geometry to one Re+4.33+ and two equivalent O2- atoms. Both O–O bond lengths are 2.89 Å. In the second O2- site, O2- is bonded in a 6-coordinate geometry to two equivalent O2- and four Br1- atoms. There are two shorter (3.35 Å) and two longer (3.62 Å) O–Br bond lengths. There are six inequivalent Br1- sites. In the first Br1- site, Br1- is bonded in a distorted single-bond geometry to one Re+4.33+ and one O2- atom. In the second Br1- site, Br1- is bonded in a distorted water-like geometry to two equivalent Re+4.33+ atoms. In the third Br1- site, Br1- is bonded in a single-bond geometry to one Re+4.33+ and two equivalent O2- atoms. In the fourth Br1- site, Br1- is bonded in a distorted single-bond geometry to one Re+4.33+ atom. In the fifth Br1- site, Br1- is bonded in a 2-coordinate geometry to two Re+4.33+ atoms. In the sixth Br1- site, Br1- is bonded in a 2-coordinate geometry to two equivalent Re+4.33+ atoms.