Materials Data on Cu3Si by Materials Project
Cu3Si is Uranium Silicide-like structured and crystallizes in the hexagonal P6_3/mmc space group. The structure is three-dimensional. Cu+1.33+ is bonded in a distorted see-saw-like geometry to four equivalent Si4- atoms. There are two shorter (2.55 Å) and two longer (2.58 Å) Cu–Si bond lengths. Si4- is bonded to twelve equivalent Cu+1.33+ atoms to form a mixture of face and corner-sharing SiCu12 cuboctahedra.
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