Magnesium fluoride

Magnesium fluoride is an ionically bonded inorganic compound with the formula MgF2. The compound is a white crystalline salt and is transparent over a wide range of wavelengths, with commercial uses in optics that are also used in space telescopes. It occurs naturally as the rare mineral sellaite.

Magnesium fluoride
Names
Other names
Sellaite
Irtran-1
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.029.086
EC Number
  • 231-995-1
RTECS number
  • OM3325000
UNII
  • InChI=1S/2FH.Mg/h2*1H;/q;;+2/p-2 Y
    Key: ORUIBWPALBXDOA-UHFFFAOYSA-L Y
  • InChI=1/2FH.Mg/h2*1H;/q;;+2/p-2
    Key: ORUIBWPALBXDOA-NUQVWONBAK
  • F[Mg]F
  • [Mg+2].[F-].[F-]
Properties
MgF2
Molar mass 62.3018 g/mol
Appearance White tetragonal crystals
Density 3.148 g/cm3
Melting point 1,263 °C (2,305 °F; 1,536 K)
Boiling point 2,260 °C (4,100 °F; 2,530 K)
0.013 g/(100 mL)
5.16⋅10−11
Solubility
−22.7⋅10−6 cm3/mol
1.37397
Structure
Rutile (tetragonal), tP6
P42/mnm, No. 136
Thermochemistry
61.6 J⋅mol−1⋅K−1
57.2 J⋅mol−1⋅K−1
−1124.2 kJ⋅mol−1
−1071 kJ/mol
Hazards
GHS labelling:
Warning
H303, H315, H319, H335
P261, P304+P340, P305+P351+P338, P405
NFPA 704 (fire diamond)
3
0
0
Lethal dose or concentration (LD, LC):
2330 (rat, oral)
Safety data sheet (SDS) ChemicalBook
Related compounds
Other anions
Other cations
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references
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