Relationship between the two-component system 1-Br-adamantane+1-Cl-adamantane and the high-pressure properties of the pure components

The temperature-composition phase diagram of the two-component system 1-Br-adamantane and 1-C1adamantane has been determined by means of thermal analysis techniques and X-ray powder diffraction from the low-temperature phase to the liquid state. The crossed isopolymorphism formalism has been applied to the two-component system to infer the normal pressure properties of the orthorhombic metastable phase of 1-C1-adamantane at normal pressure. The experimental pressure-temperature phase diagrams for the involved compounds are related to the two-phase equilibria determined at normal pressure and inferences about the monotropic behavior of the aforementioned orthorhombic phase are discussed. (C) 2017 Elsevier B.V. All rights reserved.