monotropic transition
The @[email protected] from a @[email protected] polymorphic form to the @[email protected] polymorph. Example: The transition of @[email protected] CaCO3 (aragonite-type) to the @[email protected] CaCO3 (calcite-type).
For liquid crystals the term refers to a @[email protected] to @[email protected] that occurs below the @[email protected] 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 [Terms] [Paper]