We may conclude that in polymorphs the substance occurs in different phases (or molecular aggregations), and the equilibrium between these phases follows definite laws, being dependent upon temperature and pressure, and amenable to thermodynamic treatment (cf.
The transformation of polymorphs presents certain analogies to the solidification of a liquid.
At the same time there may be conditions of temperature and pressure at which polymorphs may exist side by side.
A comparison of the transformation of polymorphs leads to a twofold classification: (1) polymorphs directly convertible in a reversible manner - termed " enantiotropic " by O.
Lehmann and (2) polymorphs in which the transformation proceeds in one direction only - termed " monotropic."
How would you define polymorphs? Add your definition here.