Vanadium(III) fluoride is the chemical compound with the formula VF3. This yellow-green, refractory solid is obtained in a two-step procedure from V2O3.[4] Similar to other transition-metal fluorides (such as MnF2), it exhibits magnetic ordering at low temperatures (e.g. V2F6.4H2O orders below 12 K[5]).
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Other names
Vanadium fluoride, Vanadium trifluoride
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Identifiers | |
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3D model (JSmol)
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ChemSpider |
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ECHA InfoCard | 100.030.141 |
PubChem CID
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UNII |
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CompTox Dashboard (EPA)
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Properties | |
F3V | |
Molar mass | 107.9367 g·mol−1 |
Appearance | Yellow-green powder (anhydrous) Green powder (trihydrate)[1] |
Density | 3.363 g/cm3[1] |
Melting point | 1,395 °C (2,543 °F; 1,668 K) at 760 mmHg (anhydrous) ~ 100 °C (212 °F; 373 K) at 760 mmHg (trihydrate) decomposes[1] |
Boiling point | Sublimes |
Insoluble[1] | |
Solubility | Insoluble in EtOH[1] |
2.757·10−3 cm3/mol[1] | |
Structure | |
Rhombohedral, hR24[2] | |
R3c, No. 167[2] | |
3 2/m[2] | |
a = 5.17 Å, c = 13.402 Å[2] α = 90°, β = 90°, γ = 120°
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Hazards | |
GHS labelling: | |
[3] | |
Danger | |
H301, H311, H314, H331[3] | |
P261, P280, P301+P310, P305+P351+P338, P310[3] | |
NFPA 704 (fire diamond) | |
Related compounds | |
Other anions
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Vanadium(III) chloride Vanadium(III) oxide Vanadium(III) nitride |
Other cations
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Vanadium(IV) 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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Infobox references
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The first step entails conversion to the hexafluorovanadate(III) salt using ammonium bifluoride:
In the second step, the hexafluorovanadate is thermally decomposed.
The thermal decomposition of ammonium salts is a relatively common method for the preparation of inorganic solids.
VF3 can also be prepared by treatment of V2O3 with HF.[citation needed] VF3 is a crystalline solid with 6 coordinate vanadium atoms with bridging fluorine atoms. The magnetic moment indicates the presence of two unpaired electrons.