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Formula
as commonly written: CaF2
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~Hill system formula: Ca1F2
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~CAS
registry number: [7789-75-5]
~Formula weight: 78.075
~Class: fluoride
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Physical
properties
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~Colour: white
~Appearance: crystalline solid
~Melting point: 1418¢XC
~Boiling point: 2533¢XC
~Density: 3180 kg m-3
Synthesis
- One
way to make small amounts of calcium fluoride is by the neutralisation of
chalk with hydrofluoric acid.
CaCO3(s) + 2HF(aq) CaF2(s) + H2O(l) + CO2(g)- Solid
state structure
- ~Geometry
of calcium:
~Prototypical structure: CaF2 (fluorite)
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