Iron compounds: iron dibromide

iron symbol icon

The iron in iron dibromide formally is in the oxidation state 2.

Crystal structure of iron dibromide

Iron dibromide

  • Formula as often written: FeBr2
  • Hill system formula: Br2Fe1
  • CAS registry number: [7789-46-0]
  • Formula weight: 215.653
  • Class: bromide


  • iron dibromide
  • iron(II) bromide
  • iron bromide

Physical properties

  • Colour: yellow to brown
  • Appearance: crystalline solid
  • Melting point: 684°C (decomposes)
  • Boiling point: 967°C
  • Density: 4636 kg m-3)


Coming soon...

Element analysis

Element percentages for the elements in iron dibromide
Element %
Br 74.10
Fe 25.90


Not available

Solid state structure

  • Geometry of iron:
  • Prototypical structure: CdI2

Crystal structure of iron dibromide

Isotope pattern

What follows is the calculated isotope pattern for the FeBr2 unit with the most intense ion set to 100%.

Formula: Fe1Br2

mass  %
212   3.2 __
213 0.0
214 55.9 ____________________________
215 1.2 _
216 100.0 __________________________________________________
217 2.3 _
218 47.4 ________________________
219 1.1 _
220 0.1


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.

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iron atomic number