Keywords: Phase diagram, heat of fusion, thermodynamic excess and mixing functions, interfacial energy, critical size of nucleus, roughness parameter

Abstract

Co-crystals of 8-Hydroxyquinoline (HQ) with Urea (U) has been prepared through melting method. The phase diagram in terms of temperature- composition curve shows the formation of additive co-crystal/ molecular complex (C) between HQ and U and also indicates that the stoichiometry of addition compound is 1:2followed by two side by side eutectics (E1 and E2).