monotropic transition

https://doi.org/10.1351/goldbook.M04028
The irreversible transition from a metastable polymorphic form to the stable polymorph. Example: The transition of metastable CaCO3 (aragonite-type) to the stable CaCO3 (calcite-type).
Note:
For liquid crystals the term refers to a liquid crystal to liquid-crystal transition that occurs below the melting point and is revealed by supercooling of the crystal.
Source:
PAC, 1994, 66, 577. (Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)) on page 586 [Terms] [Paper]
Citation: 'monotropic transition' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.M04028 RIS BibTex EndNote
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Last revised: February 24, 2014