WebElements Periodic Table of the Elements | Iron | triiron diphosphate octahydrate

Iron compounds: triiron diphosphate octahydrate

The iron in triiron diphosphate octahydrate formally is in the oxidation state 2.

Triiron diphosphate octahydrate

Formula as often written: Fe₃(PO₄)₂.8H₂O
Hill system formula: Fe₃H₁₆O₁₆P₂
CAS registry number: [14940-41-1]
Formula weight: 501.6
Class: complex

Synonyms

triiron diphosphate octahydrate
iron(II) phosphate 8-water
iron phosphate 8-water

Physical properties

Colour: grey-blue
Appearance: crystalline solid
Melting point:
Boiling point:
Density: 2580 kg m^-3

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Element analysis

Element percentages for the elements in triiron diphosphate octahydrate
Element	%
Fe	33.40
H	3.22
O	51.03
P	12.35

Synthesis

Not available

Isotope pattern

What follows is the calculated isotope pattern for the Fe₃(PO₄)₂.8H₂O unit with the most intense ion set to 100%.

Formula: Fe₃P₂O₁₆H₁₆

mass  %
496   0.0 
497   0.0 
498   1.2 _
499   0.0 
500  18.9 _________
501   1.1 _
502 100.0 __________________________________________________
503   8.0 ____
504   4.3 __
505   0.3 
506   0.1

References

The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.

R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.