Boron carbides are boron–carbon compounds.
Boron carbide (B4C)
B13C2
α-tetragonal boron α-tetragonal boron is a boron-rich isotropic boron carbide (B50C2).
Borafullerenes
Borafullerenes are a class of heterofullerenes in which the element substituting for carbon is boron.
See also Crystal structure of boron-rich metal borides
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