Li₂B₁₂C₂ and LiB₁₃C₂: Colorless Boron‐Rich Boride Carbides of Lithium

Wade was right: Li2B12C2 and LiB13C2, the first boron-rich boride carbides of lithium, are (nearly) colorless and stoichiometrically composed. Their crystal structures are characterized by B12 icosahedra and C2 and CBC units, respectively, forming a three-dimensional framework with Li cations in the voids. The charge distribution can be described by Wade's rules: (Li+)2B122−C2 and (Li+)B122−(CBC+). The synthesis succeeded in molten metals at high temperatures.