Calcium fluoride

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White powder primarily obtained from the mineral fluorite. Calcium fluoride may be made synthetically by the reaction of soda lime with anhydrous hydrogen fluoride. It is used in the production of abrasives, ceramic glazes, enamels, glass, soldering agents, welding agents, pyrotechnics, and for metal surface treatment.

Synonyms and Related Terms

calcium difluoride; fluorspar; fluorite; Derbyshire spar

Chemical structure

Calcium fluoride.jpg

Other Properties

Cubic crystals. Luminous when heated. Autofluorescent.

Insoluble in water. Dissolved by concentrated mineral acids with evolution of HF.

Composition CaF2
CAS 7789-75-5
Mohs Hardness 4.0
Melting Point 1403
Density 3.18
Molecular Weight mol. wt. = 78.07
Refractive Index 1.433-1.435
Boiling Point 2500

Hazards and Safety

Contact may cause irritation. Ingestion may be harmful. \Heating may release fluorine gas.

Mallinckrodt Baker: MSDS

Sources Checked for Data in Record

  • G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 372
  • The Merck Index, Susan Budavari (ed.), Merck Research Labs, Whitehouse Station, NJ, 12th Edition, 1996 Comment: entry 1709
  • The Condensed Chemical Dictionary, Francis Turner (ed.), Reinhold Publishing Corp., New York City, 3rd edition, 1942
  • Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979
  • The American Heritage Dictionary or Encarta, via Microsoft Bookshelf 98, Microsoft Corp., 1998