 | |
| Names | |
|---|---|
| Other names Vanadium fluoride, Vanadium trifluoride | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider |
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| ECHA InfoCard | 100.030.141 |
| UNII | |
| |
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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 inEtOH[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° | |
| 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 | |
Otheranions | Vanadium(III) chloride Vanadium(III) oxide Vanadium(III) nitride |
Othercations | Vanadium(IV) fluoride |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Vanadium(III) fluoride is thechemical compound with the formula VF3. It is a yellow-green crystalline solid withhexacoordinatevanadium atoms and bridgingfluorine atoms. Themagnetic moment indicates the presence of twounpaired electrons. Similar to other transition-metal fluorides (such asMnF2), it exhibits magnetic ordering at low temperatures (e.g. V2F6.4H2O orders below 12 K[4]).
Vanadium(III) fluoride is obtained in a two-step procedure from V2O3.[5]
The first step entails conversion to the hexafluorovanadate(III) salt usingammoniumbifluoride:
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.
It can also be prepared by treatment of V2O3 with HF.[citation needed]
