phospate
The chemical name for Zn3(PO4)2 is zinc phosphate.
The name of Hg3(PO4)2 is trimercury diphosphate.
PO43- is the phosphate ion.
The chemical name for Mg3(PO4)2 is magnesium phosphate.
The correct name for Sr3(PO4)2 is strontium phosphate.
The correct name for S3(PO4)2 is trisodium diphosphate.
The name of the compound Pb3(PO4)4 is lead(IV) phosphate.
I believe that what you have in mind is the phosphate radical, PO4. While this radical appears in many compounds, it is not itself a compound.
Iridium (IV) phosphate
Phosphate
The name of this compound is zinc phosphide.
The chemical name for Zn3(PO4)2 is zinc phosphate.