monotrope

English

Noun

monotrope (plural monotropes)

1. (botany) Any plant belonging to the Monotropoideae.
2. (chemistry, geology) A polymorph that does not have a reversible transformation into another form; A polymorphic crystal for which one form is more stable than any other form when cooled below the melting point.
   • 2004, Peter York, ‎Uday B. Kompella, ‎Boris Y. Shekunov, Supercritical Fluid Technology for Drug Product Development, page 288:

     Since α-carbamazepine is a monotrope of γ-carbamazepine, and γ-carbamazepine is an enantiotrope of β-carbamazepine, the physical stability hierarchy depends on the transition temperature of β- and γ-carbamazepine.

   • 2011, Gautam R. Desiraju, ‎Jagadese J. Vittal, ‎Arunachalam Ramanan, Crystal Engineering, page 112:

     Differential scanning calorimetry (DSC) or differential thermal analysis (DTA) scans (Section 5.5.3) can be employed to distinguish an enantiotrope from a monotrope.

   • 2014, William J. Brock, ‎Barbara Mounho, ‎Lijie Fu, The Role of the Study Director in Nonclinical Studies, page 174:

     These can be differentiated on a thermal scan where an endothermic transition indicates enantiotropes and an exothermic transition indicates monotropes.

Coordinate terms

• enantiotrope