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.
PO43- is the phosphate ion.
Sn3(PO4)2
There are at least two "magnesium phosphates", but the most common one has the formula Mg3(PO4)2.
PO4 is a radical, not a compound, and it has a covalent bond, not an ionic bond.
The chemical formula of calcium phosphate is Ca3(PO4)2.
Phosphate
the compound name for Ba3(PO4)2 is Barium Phosphate.
PO43- is the phosphate ion.
Sn3(PO4)2
The compound Ca3 PO4 is called Calcium Phosphate.
There are at least two "magnesium phosphates", but the most common one has the formula Mg3(PO4)2.
The name of this compound is zinc phosphide.
PO4 is a radical, not a compound, and it has a covalent bond, not an ionic bond.
The chemical formula of calcium phosphate is Ca3(PO4)2.
Ionic compound
do's PO4 com[ound do's PO4 com[ound
tin III phosphate