what is alpha and beta black phosphorous ?what is their difference between them?

Asked by madhumitha.pavith93 | 30th Aug, 2010, 12:00: AM

Expert Answer:

Black phosphorus has two forms α-black phosphorus and β-black phosphorus. α-Black phosphorus is formed when red phosphorus is heated in a sealed tube at 803K. It can be sublimed in air and has opaque monoclinic or rhombohedral crystals. It does not oxidise in air. β-Black phosphorus is prepared by heating white phosphorus at 473 K under high pressure. It does not burn in air upto 673 K.

Answered by  | 31st Aug, 2010, 09:41: PM

Queries asked on Sunday & after 7pm from Monday to Saturday will be answered after 12pm the next working day.