Materials Data on CaReH4ClO6 by Materials Project

Abstract

(CaRe(H2O3)2)2Cl2 crystallizes in the orthorhombic Cmcm space group. The structure is three-dimensional and consists of four hydrochloric acid molecules and one CaRe(H2O3)2 framework. In the CaRe(H2O3)2 framework, Ca2+ is bonded in a 8-coordinate geometry to eight O2- atoms. There are a spread of Ca–O bond distances ranging from 2.40–2.61 Å. Re7+ is bonded in a tetrahedral geometry to four O2- atoms. All Re–O bond lengths are 1.75 Å. H1+ is bonded in a single-bond geometry to one O2- atom. The H–O bond length is 1.00 Å. There are three inequivalent O2- sites. In the first O2- site, O2- is bonded in a distorted linear geometry to one Ca2+ and one Re7+ atom. In the second O2- site, O2- is bonded in a water-like geometry to two equivalent Ca2+ and two equivalent H1+ atoms. In the third O2- site, O2- is bonded in a linear geometry to one Ca2+ and one Re7+ atom.