Iron(II) fluoride
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Iron(II) fluoride or ferrous fluoride is an inorganic compound with the molecular formula FeF2. It forms a tetrahydrate FeF2·4H2O that is often referred to by the same names. The anhydrous and hydrated forms are white crystalline solids.[1][5]
Quick Facts Identifiers, Properties ...
Identifiers | |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.029.232 |
PubChem CID |
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UNII | |
CompTox Dashboard (EPA) |
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Properties | |
FeF2 | |
Molar mass | 93.84 g/mol (anhydrous) 165.902 g/mol (tetrahydrate) |
Appearance | colorless transparent crystals[1] |
Density | 4.09 g/cm3 (anhydrous) 2.20 g/cm3 (tetrahydrate) |
Melting point | 970 °C (1,780 °F; 1,240 K) (anhydrous) 100 °C (tetrahydrate)[2] |
Boiling point | 1,100 °C (2,010 °F; 1,370 K) (anhydrous) |
Solubility product (Ksp) |
2.36×10−6[3] |
Solubility | insoluble in ethanol, ether; dissolves in HF |
+9500.0·10−6 cm3/mol | |
Structure | |
Rutile (tetragonal), tP6 | |
P42/mnm, No. 136 | |
Hazards | |
Occupational safety and health (OHS/OSH): | |
Main hazards |
Causes severe skin burns & eye damage; Hazardous decomposition products formed under fire conditions- Iron oxides[4] |
GHS labelling: | |
NFPA 704 (fire diamond) | |
Flash point | not applicable[4] |
Related compounds | |
Other anions |
Iron(II) chloride Iron(II) bromide Iron(II) iodide Iron(II) oxide |
Other cations |
Manganese(II) fluoride Cobalt(II) fluoride |
Related compounds |
Iron(III) fluoride |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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