Chromium(II) fluoride
| Names | |
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| Other names
chromium difluoride, chromium fluouride, chromous fluoride
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| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.030.140 |
| EC Number |
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PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| CrF2 | |
| Molar mass | 89.9929 g·mol−1 |
| Appearance | blue-green solid hygroscopic |
| Density | 4.11 g/cm3 |
| Melting point | 894 °C (1,641 °F; 1,167 K) |
| Boiling point | 1,300 °C (2,370 °F; 1,570 K) |
| 76.7 g/100 mL | |
| Structure | |
| monoclinic | |
| Thermochemistry | |
Std enthalpy of
formation (ΔfH⦵298) |
-8.645 kJ/g (solid) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chromium(II) fluoride is a Chromium halogen compound which is 57.78% Chromium and 42.22% Fluorine by weight and which has blue-green, monoclinic iridescent crystals. It is prepared from Chromium(II) chloride and hydrofluoric acid. Chromium(II) fluoride is sparingly soluble in water, almost insoluble in alcohol, and is soluble in boiling hydrochloric acid, but is not attacked by hot distilled sulfuric acid or nitric acid. Chromium(II) fluoride changes into Chromium(III) oxide when heated in air. Its principle uses are in chromizing, hydrocarbon cracking, as an alkylation catalyst.
