monotropic transition
The @I03258@ from a @M03872@ polymorphic form to the @S05900@ polymorph. Example: The transition of @M03872@ CaCO3 (aragonite-type) to the @S05900@ CaCO3 (calcite-type).
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 [Terms] [Paper]