Vanadium(III) fluoride

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title: "Vanadium(III) fluoride" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["fluorides", "metal-halides", "vanadium(iii)-compounds"] topic_path: "general/fluorides" source: "https://en.wikipedia.org/wiki/Vanadium(III)_fluoride" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 470628735 | Name = Vanadium(III) fluoride | ImageFile = RhF3.png | ImageName = | OtherNames = Vanadium fluoride, Vanadium trifluoride |Section1={{Chembox Identifiers | InChI = 1/3FH.V/h31H;/q;;;+3/p-3 | InChIKey = PASVSMBJEYQYSN-DFZHHIFOAM | SMILES = [V+3].[F-].[F-].[F-] | StdInChI_Ref = | StdInChI = 1S/3FH.V/h31H;/q;;;+3/p-3 | StdInChIKey_Ref = | StdInChIKey = PASVSMBJEYQYSN-UHFFFAOYSA-K | CASNo_Ref = | CASNo = 10049-12-4 | UNII_Ref = | UNII = O3S3Z32R8P | PubChem = 66230 | ChemSpiderID_Ref = | ChemSpiderID=16057827 |Section2={{Chembox Properties | V=1 | F=3 | Appearance = Yellow-green powder (anhydrous) Green powder (trihydrate) | Density = 3.363 g/cm3 | Solubility = Insoluble | SolubleOther = Insoluble in EtOH | MeltingPtC = 1395 | MeltingPt_notes = at 760 mmHg (anhydrous) ~ 100 C at 760 mmHg (trihydrate) decomposes | BoilingPt = Sublimes | MagSus = 2.757·10−3 cm3/mol |Section3={{Chembox Structure | CrystalStruct = Rhombohedral, hR24 | SpaceGroup = Rc, No. 167 | PointGroup = 2/m | LattConst_a = 5.17 Å | LattConst_b = | LattConst_c = 13.402 Å | LattConst_alpha = | LattConst_beta = | LattConst_gamma = 120 |Section7={{Chembox Hazards | MainHazards = | GHSPictograms = | GHSSignalWord = Danger | HPhrases = | PPhrases = | NFPA-H = 3 | NFPA-R = 2 | NFPA-F = 0 |Section8={{Chembox Related | OtherAnions = Vanadium(III) chloride Vanadium(III) oxide Vanadium(III) nitride | OtherCations = Vanadium(IV) fluoride | OtherFunction = | OtherFunction_label = | OtherCompounds =

Vanadium(III) fluoride is the chemical compound with the formula VF3. It is a yellow-green crystalline solid with hexacoordinate vanadium atoms and bridging fluorine atoms. The magnetic moment indicates the presence of two unpaired electrons. Similar to other transition-metal fluorides (such as MnF2), it exhibits magnetic ordering at low temperatures (e.g. V2F6.4H2O orders below 12 K).

Preparation

Vanadium(III) fluoride is obtained in a two-step procedure from V2O3.

The first step entails conversion to the hexafluorovanadate(III) salt using ammonium bifluoride: :V2O3 + 6 (NH4)HF2 → 2 (NH4)3VF6 + 3 H2O

In the second step, the hexafluorovanadate is thermally decomposed. :(NH4)3VF6 → 3 NH3 + 3 HF + VF3

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.

References

General references

References

  1. {{CRC90
  2. (2007). "Structure and Chemistry of Crystalline Solids". Springer Science+Business Media, Inc..
  3. {{Sigma-Aldrich
  4. S. Nakhal et al., Z. Kristallogr. 228, 347 (2013).{{doi. 10.1524/zkri.2013.1664
  5. Sturm, B. J.; Sheridan, C. W. "Vanadium(III) Fluoride" Inorganic Syntheses 1963; Vol. 7, pages 52-54. {{ISBN. 0-88275-165-4.

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fluoridesmetal-halidesvanadium(iii)-compounds