Iron(II) phosphate

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Iron(II) phosphate
Iron(II) phosphate.svg
Fosforečnan železnatý.PNG
CAS number 14940-41-1
PubChem 9863567
ChemSpider 8039263 YesY
Jmol-3D images Image 1
Molecular formula Fe3O8P2
Molar mass 357.48 g mol−1
Appearance brown powder
Density 2.61 g/cm3 (octahydrate)
Melting point 180 °C (356 °F; 453 K) (octahydrate) decomposes[1]
Solubility in water insoluble
Crystal structure monoclinic (octahydrate)
Space group C 2/m
Lattice constant a = 10.086 (octahydrate), b = 13.441 (octahydrate), c = 4.703 (octahydrate)
Lattice constant α = 90°, β = 104.27°, γ = 90°
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
Infobox references

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.

Natural occurrences[edit]

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[edit]


  1. ^ "iron(II) phosphate octahydrate". Retrieved 2 July 2014. 

External links[edit]