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  Inorganic Chemistry

BLACK PHOSPHORUS :

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It is obtained by heating white phosphorus at 470K under high pressure (4000–12000atm) in an inert atmosphere.

                                          470K
White phosphorus ————→ Black phosphorus
                                4000-12000atm. pressue

It has a double layered structure. Each layer is made up of zig-zag chains with P - P - P bond angle of 99o . Since it is highly polymeric, it has high density. It is the most stable (inactive) form of phosphorus and has a black metallic luster. It is a good conductor of heat and electricity.

 

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