It's important to be specific about the vanadium compound fluoride when asking about a reaction. There are many different vanadium fluoride compounds, each with its own unique properties and breakdown behavior.

For example, some common vanadium fluorides include:

* Vanadium(II) fluoride (VF₂)

* Vanadium(III) fluoride (VF₃)

* Vanadium(IV) fluoride (VF₄)

* Vanadium(V) fluoride (VF₅)

Here's a general breakdown of what can happen when vanadium fluorides decompose:

* Thermal Decomposition: Vanadium fluorides can decompose when heated to a high enough temperature. The exact temperature required depends on the specific compound. The decomposition can lead to the formation of lower oxidation state vanadium fluorides, elemental vanadium, and fluorine gas.

* Hydrolysis: Some vanadium fluorides are susceptible to hydrolysis in the presence of water. This reaction can produce vanadium oxides, hydrofluoric acid (HF), and other byproducts.

To provide a more specific answer, please tell me the exact vanadium fluoride compound you are interested in.

For instance, if you are interested in the decomposition of vanadium(III) fluoride (VF₃), the reaction could be:

2 VF₃ (s) → V₂O₃ (s) + 3 F₂ (g)

This reaction occurs at high temperatures and produces vanadium(III) oxide and fluorine gas.

Once you specify the compound, I can provide a more accurate and detailed description of the reaction.