Materials Data on Cu3W by Materials Project
WCu3 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional. W is bonded in a distorted body-centered cubic geometry to fourteen Cu atoms. There are eight shorter (2.56 Å) and six longer (2.96 Å) W–Cu bond lengths. There are two inequivalent Cu sites. In the first Cu site, Cu is bonded to four equivalent W and four equivalent Cu atoms to form a mixture of distorted face, edge, and corner-sharing CuCu4W4 tetrahedra. All Cu–Cu bond lengths are 2.56 Å. In the second Cu site, Cu is bonded in a 8-coordinate geometry to six equivalent W and eight equivalent Cu atoms.
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