Zirconium diphosphide is a binary inorganic compound of zirconium metal and phosphorus with the chemical formula .
Preparation Zirconium diphosphide can be obtained from arc-melting of zirconium with red phosphorus:
Physical properties Zirconium diphosphide forms grey crystals that is insoluble in water. Zirconium diphosphide is very toxic. Has a lead(II) chloride crystal structure. It dissolves in warm concentrated sulfuric acid. It decomposes into phosphorus and ZrP when heated in vacuum:
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