Barium compounds: barium difluoride
The barium in barium difluoride formally is in the oxidation state 2.
- Formula as often written: BaF2
- Hill system formula: Ba1F2
- CAS registry number: [7787-32-8]
- Formula weight: 175.324
- Class: fluoride
- barium difluoride
- barium(II) fluoride
- barium fluoride
- Colour: white
- Appearance: crystalline solid
- Melting point: 1368°C
- Boiling point: 2260°C; 2137°C
- Density: 4890 kg m-3
Element percentages for the elements in barium difluoride
Barium fluoride is made by the reaction of barium carbonate, BaCO3, with ammonium fluoride. As barium fluoride is essentially insoluble, it precipitates out.
BaCO3(aq) + 2NH4F(aq) → BaF2(s) + (NH4)2CO3(aq)
Solid state structure
- Geometry of barium: 4 coordinate: tetrahedral
- Prototypical structure: CaF2 (fluorite)
What follows is the calculated isotope pattern for the BaF2 unit with the most intense ion set to 100%.
172 3.4 __
173 9.2 _____
174 10.9 _____
175 15.7 ________
176 100.0 __________________________________________________
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.