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Names | |
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Other names
Sellaite
Irtran-1 | |
Identifiers | |
3D model (JSmol)
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ChemSpider | |
ECHA InfoCard | 100.029.086 |
EC Number |
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PubChem CID
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RTECS number |
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
MgF2 | |
Molar mass | 62.3018 g/mol |
Appearance | Colorless to 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) | |
Solubility product (Ksp)
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5.16⋅10−11 |
Solubility |
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−22.7⋅10−6 cm3/mol | |
Refractive index (nD)
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1.37397 |
Structure | |
Rutile (tetragonal), tP6 | |
P42/mnm, No. 136 | |
Thermochemistry | |
Heat capacity (C)
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61.6 J/(mol⋅K) |
Std molar
entropy (S⦵298) |
57.2 J/(mol⋅K) |
Std enthalpy of
formation (ΔfH⦵298) |
−1124.2 kJ/mol |
Gibbs free energy (ΔfG⦵)
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−1071 kJ/mol |
Hazards[2][3] | |
GHS labelling: | |
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Warning | |
H303, H315, H319, H335 | |
P261, P304+P340, P305+P351+P338, P405 | |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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2330[clarification needed] (rat, oral) |
Safety data sheet (SDS) | ChemicalBook |
Related compounds | |
Other anions
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Other cations
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Related compounds
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Magnesium fluoride is an ionically bonded inorganic compound with the formula MgF2. The compound is a colorless to 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.