Boron carbides are
boron
Boron is a chemical element; it has symbol B and atomic number 5. In its crystalline form it is a brittle, dark, lustrous metalloid; in its amorphous form it is a brown powder. As the lightest element of the boron group it has three ...
–
carbon
Carbon () is a chemical element; it has chemical symbol, symbol C and atomic number 6. It is nonmetallic and tetravalence, tetravalent—meaning that its atoms are able to form up to four covalent bonds due to its valence shell exhibiting 4 ...
compounds.
Boron carbide (B4C)
B13C2
α-tetragonal boron
α-tetragonal boron is a boron-rich isotropic boron carbide (B
50C
2).
Borafullerenes
Borafullerenes are a class of
heterofullerene Heterofullerenes are classes of fullerenes, at least one carbon atom is replaced by another element. Based on spectroscopy, substitutions have been reported with boron ( borafullerenes), nitrogen (azafullerenes), oxygen (oxafullerenes), arsenic (ars ...
s in which the element substituting for carbon is boron.
See also
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Crystal structure of boron-rich metal borides
Metals, and specifically rare-earth elements, form numerous chemical complexes with boron. Their crystal structure and chemical bonding depend strongly on the metal element M and on its atomic ratio to boron. When B/M ratio exceeds 12, boron atoms ...
References
Sources
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{{boron compounds
Inorganic carbon compounds
Boron compounds