Materials Data on Si3As4 by Materials Project
Si3As4 crystallizes in the cubic P-43m space group. The structure is three-dimensional. Si4+ is bonded to four equivalent As3- atoms to form corner-sharing SiAs4 tetrahedra. All Si–As bond lengths are 2.43 Å. As3- is bonded in a trigonal non-coplanar geometry to three equivalent Si4+ atoms.
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