Copper Silicides with the Highest Lithium Content: Li7CuSi2 Containing the 16-Electron Group [CuSi2]7− and Li7.3CuSi3 with Heterographene Nets equation image[CuSi]3.3−


  • This work was financially supported by the SNF under project no. 2-77937-10 and the ETHZ.


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Incredibly rich in lithium: The ternary silicides Li7CuSi2 with the linear [Si-Cu-Si]7− Zintl anion (see picture) and Li7.3CuSi3 are compounds with the highest lithium content in the ternary system. The crystal and electronic structures of both compounds are discussed.