The irreversible transition from a metastable polymorphic form to the stable polymorph. Example: The transition of metastable CaCO3
(aragonite-type) to the stable CaCO3
For liquid crystals the term refers to a @LT06856@ to @L03579@ that occurs below the @M03821@ point and is revealed by supercooling of the crystal.
PAC, 1994, 66, 577. 'Definitions of terms relating to phase transitions of the solid state (IUPAC Recommendations 1994)' on page 586 (https://doi.org/10.1351/pac199466030577)