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.
| Names | |
|---|---|
| Other names
Sellaite Irtran-1 | |
| Identifiers | |
3D model (JSmol) |
|
| ChemSpider | |
| ECHA InfoCard | 100.029.086 |
| EC Number |
|
PubChem CID |
|
| RTECS number |
|
| UNII | |
CompTox Dashboard (EPA) |
|
| |
| |
| 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) | |
Solubility product (Ksp) |
5.16⋅10−11 |
| Solubility |
|
| −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−1⋅K−1 |
Std molar entropy (S⦵298) |
57.2 J⋅mol−1⋅K−1 |
Std enthalpy of formation (ΔfH⦵298) |
−1124.2 kJ⋅mol−1 |
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) |
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).
Infobox references | |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.