Materials Data on La(SiAu)2 by Materials Project
LaAu2Si2 crystallizes in the tetragonal I4/mmm space group. The structure is three-dimensional. La2+ is bonded in a 8-coordinate geometry to eight equivalent Au1- atoms. All La–Au bond lengths are 3.39 Å. Au1- is bonded to four equivalent La2+ and four equivalent Si atoms to form a mixture of distorted edge, face, and corner-sharing AuLa4Si4 tetrahedra. All Au–Si bond lengths are 2.60 Å. Si is bonded in a 5-coordinate geometry to four equivalent Au1- and one Si atom. The Si–Si bond length is 2.37 Å.
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