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Compounds of iron:
iron (II) sulphide
- Formula as commonly written: FeS
- Hill system formula: Fe1S1
- CAS registry number: [1317-37-9]
- Formula weight: 87.911
- Class: sulphide
Synonyms
- iron (II) sulphide
- iron sulphide
Physical properties
- Colour: white (black when impure)
- Appearance: crystalline solid
- Melting point: 1188°C
- Boiling point: decomposes
- Density: 4700 kg m-3
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Element analysis and oxidation numbers
For each compound, and where possible, a formal oxidation number for each element is given, but the usefulness of this number is limited, especially so for p-block elements in particular. Based upon that oxidation number, an electronic configuration is also given but note that for more exotic compounds you should view this as a guide only.
| Element |
% |
Formal oxidation state |
Formal electronic configuration |
|
Fe |
63.52 |
2 |
[Ar].3d6 |
|
S |
36.48 |
-2 |
[Ne].3s2.3p6 |
Synthesis
Not available
Solid state structure
- Geometry of iron:
- Prototypical structure: NiAs

Isotope pattern
What follows is the calculated isotope pattern for the FeS unit with the most intense ion set to 100%.
Formula: Fe1S1
mass %
86 6.3 ___ 87 0.0 88 100.0 __________________________________________________ 89 3.2 __ 90 4.7 __ 91 0.1 92 0.0
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.
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