Barium Azophosphates

Certain compounds have been obtained containing both phosphorus and nitrogen. The following formulae have been ascribed to them: Ba₃P₂N₂O₈.2H₂O, Ba₂H₄P₄N₄O₈.2H₂O, BaNaH₃P₃N₃O₆.½H₂O, and also a sulphur compound, BaNPS₂.H₂O.