The formula (NH4)3PO4 does represent an ionic compound. (NH4)3PO4 is known as ammonium phosphide and it has a molar mass of 85.0891.
(NH4)3PO4 is an ionic compound that is composed of the positive polyatomic ion ammonium and the negative polyatomic ion phosphate. The ammonium ion has a positive charge while the phosphate ion has a negative charge. This is what makes it an ionic compound.
Ionic compounds consist of ions charged with opposite charges that are known as ionic. These ionic compounds, such as (NH4)3PO4 typically have high melting points, conduct electrical currents, and are solids in form. They are also typically formed from both a metal and a non-metal element.
Another example of an ionic compound, such as (NH4)3PO4, would be the common table salt, NaC1. Salt contains the sodium ions that are positive (NA+) and chloride ions that are negative(Cl-). The element of sodium is a silver-gray metal that reacts strongly with water or air and the chlorine is a gas element.
An ionic compound will always have an ionic bond and an ionic bond is present in the (NH4)3PO4 ionic compound. An ionic bond is the result of the transfer of one or more electrons from a metal to a non-metal. This is what creates the ionic bond in the ionic compound.