Calcium dihydride
- Formula: CaH2
- Hill system formula: Ca1H2
- CAS registry number: [7789-78-8]
- Formula weight: 42.094
- Class: hydride
- Colour: white or grey
- Appearance: crystalline solid
- Melting point: 816°C (under hydrogen gas)
- Boiling point:
- Density: 1700 kg m-3
The following are some synonyms of calcium dihydride:
- calcium dihydride
- calcium(II) hydride
- calcium dihydride
The oxidation number of calcium in calcium dihydride is 2.
Synthesis
Calcium hydride may be made by the reaction of calcium metal with hydrogen gas.
Ca(s) + H2(aq) (heat) → CaH2(s)
Solid state structure
- Geometry of calcium:
- Prototypical structure: CdI2
Element analysis
The table shows element percentages for CaH2 (calcium dihydride).
| Element | % |
|---|---|
| Ca | 95.21 |
| H | 4.79 |
Isotope pattern for CaH2
The chart below shows the calculated isotope pattern for the formula CaH2 with the most intense ion set to 100%.
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.