Question

What are the allotrophs of boron ?

Answer 1

Answer:

Well known crystalline forms are α-rhombohedral, β-rhombohedral, and β-tetragonal. In special circumstances,boron can also be synthesized in the form of its α-tetragonal and γ-orthorhombic allotropes. Two amorphous forms, one a finely divided powder and the other a glassy solid, are also known.