Iron(II) phosphate, also ferrous phosphate, Fe3(PO4)2, is an iron salt of phosphoric acid. It is used in garden chemicals such as moss killers and slug pellets.
It has a molar mass of 357.478 g/mol and is insoluble in water.
Natural occurrences 
The mineral vivianite is a naturally occurring form of hydrated iron(II) phosphate.
It can be formed by the reaction of ferrous hydroxide with phosphoric acid to produce hydrated iron(II) phosphate.
See also 
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