Materials Data on Si2W3 by Materials Project
W3Si2 crystallizes in the tetragonal P4/mbm space group. The structure is three-dimensional. there are two inequivalent W+2.67+ sites. In the first W+2.67+ site, W+2.67+ is bonded in a square co-planar geometry to four equivalent Si4- atoms. All W–Si bond lengths are 2.58 Å. In the second W+2.67+ site, W+2.67+ is bonded to six equivalent Si4- atoms to form a mixture of distorted face, edge, and corner-sharing WSi6 pentagonal pyramids. There are two shorter (2.55 Å) and four longer (2.57 Å) W–Si bond lengths. Si4- is bonded in a 9-coordinate geometry to eight W+2.67+ and one Si4- atom. The Si–Si bond length is 2.51 Å.
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