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Phosphorus compounds: phosphine
The phosphorus in phosphine formally is in the oxidation state 3.

Phosphine
- Formula as often written: PH3
- Hill system formula: H3P1
- CAS registry number: [7803-51-2]
- Formula weight: 33.998
- Class: hydride
Synonyms
- phosphine
- phosphorus(III) hydride
- phosphorus hydride
- phosphorus trihydride
Physical properties
- Colour: colourless
- Appearance: gas
- Melting point: -133°C
- Boiling point: -88°C
- Density: 1.5 kg m-3 (gas)
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Element analysis
Element percentages for the elements in phosphine
| Element |
% |
| H |
8.89 |
| P |
91.11 |
Synthesis
Not available
Solid state structure
- Geometry of phosphorus: 3 coordinate: pyramidal
- Prototypical structure:

Isotope pattern
What follows is the calculated isotope pattern for the PH3 unit with the most intense ion set to 100%.
Formula: P1H3
mass %
34 100.0 __________________________________________________ 35 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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