Magnesium fluoride
| Names | |
|---|---|
| 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)
|
5.16⋅10−11 |
| Solubility |
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| −22.7⋅10−6 cm3/mol | |
Refractive index (nD)
|
1.37397 |
| Structure | |
| Rutile (tetragonal), tP6 | |
| P42/mnm, No. 136 | |
| Thermochemistry | |
Heat capacity (C)
|
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⦵)
|
−1071 kJ/mol |
| Hazards | |
| GHS labelling: | |
| 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 (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).
Infobox references
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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 that is transparent over a wide range of wavelengths, such that it is used in the optical windows of space telescopes. It occurs naturally as the rare mineral sellaite.