Properties | More Info | Isotopes | Allotropes | Spectra
Compounds | Reactions | Production
Atomic: M.A.C. | Reference
Diagrams: Shell | Atomic Radius | Electron || Images
Allotropes of Boron
All allotropes of boron have very high melting points, from 2,200-2,300°C.
Amorphous Boron [ B ]
An amorphous brown powder with a density of 2.350 g/cm3.
alpha-rhombohedral Boron [ B12 ]
Clear red crystalline structure with a density of 2.46 g/cm3.
beta-rhombohedral Boron [ B12 ]
An allotrope consisting of black crystals with a metallic appearance. Density is 2.31 g/cm3.
The most thermodynamically stable allotrope.
beta-tetragonal Boron [ B12 ]
Black crystalline structure.
See Also
Allotrope.