Title: Verwey transition
Long Title: IUPAC Gold Book - Verwey transition
DOI: 10.1351/goldbook.V06612
Status: current

Definition
An electron-ordering transition occurring in a mixed-valent system that results in an ordering of formal valence states in the low-temperature phase. Example: The prototype system, first identified by Verwey, is the ferrospinel magnetite, $\ce{Fe^{3+}[Fe^{3+}Fe^{2+}]O4}$ in which an ordering of $\ce{Fe^{3+}}$ and $\ce{Fe^{2+}}$ ions within octahedral sites is thought to occur below \(T_{\rm{v}}\approx 120\ \rm{K}\).

Related Term
- valence: https://goldbook.iupac.org/terms/view/V06588

Source
- PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 593 (https://doi.org/10.1351/pac199466030577)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/V06612/html
- json: https://goldbook.iupac.org/terms/view/V06612/json
- xml: https://goldbook.iupac.org/terms/view/V06612/xml

Citation: Citation: 'Verwey transition' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.V06612
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Accessed: 2026-06-30T18:50:44+00:00