Au3Si is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to four equivalent Au(2) and four equivalent Si(1) atoms to form a mixture of distorted corner, edge, and face-sharing AuSi4Au4 tetrahedra. In the second Au site, Au(2) is bonded in a body-centered cubic geometry to eight equivalent Au(1) atoms. Si(1) is bonded in a body-centered cubic geometry to eight equivalent Au(1) atoms.
Au3Si is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded to four equivalent Au(2) and four equivalent Si(1) atoms to form a mixture of distorted corner, edge, and face-sharing AuSi4Au4 tetrahedra. All Au(1)-Au(2) bond lengths are 2.85 Å. All Au(1)-Si(1) bond lengths are 2.85 Å. In the second Au site, Au(2) is bonded in a body-centered cubic geometry to eight equivalent Au(1) atoms. Si(1) is bonded in a body-centered cubic geometry to eight equivalent Au(1) atoms.