Zinc Phosphate.
=)
The chemical name for Zn3(PO4)2 is zinc phosphate.
1 mole Zn3(PO4)2 (2 moles P/1 mole Zn3(PO4)2) 2 moles phosphorous ===============
The name of the compound is zinc phosphate. The prefix '3' is irrelevant in this case, and is probably from a chemical equation to denote the stoichiometric ratio of itself and the other reactants/products. The elements present are zinc, phosphorous and oxygen, and the compound is used as an anti-corrosion coating in electroplating.