Materials Data on Si3F by Materials Project
(Si)6F2 is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. The structure is three-dimensional and consists of four hydrofluoric acid molecules and one Si framework. In the Si framework, there are two inequivalent Si sites. In the first Si site, Si is bonded in a 4-coordinate geometry to four equivalent Si atoms. All Si–Si bond lengths are 2.59 Å. In the second Si site, Si is bonded in a body-centered cubic geometry to eight equivalent Si atoms.
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