https://doi.org/10.1140/epjst/e2016-60246-6
Review
Pitfalls and feedback when constructing topological pressure-temperature phase diagrams
1 Laboratoire de Chimie Physique et Chimie Minérale, Faculté de Pharmacie, Université Paris Descartes, 4 avenue de l'observatoire, 75006 Paris, France
2 Grup de Caracterització de Materials (GCM), Departament de Física i Enginyeria Nuclear, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Spain
3 Département de Chimie – UMR 6226, Faculté des Sciences, Université de Rennes 1, Bâtiment 10B, 263, Avenue du Général Leclerc, 35042 Rennes Cedex, France
a e-mail: josep.lluis.tamarit@upc.edu
Received: 25 August 2016
Revised: 19 September 2016
Published online: 18 April 2017
The stability hierarchy between different phases of a chemical compound can be accurately reproduced in a topological phase diagram. This type of phase diagrams may appear to be the result of simple extrapolations, however, experimental complications quickly increase in the case of crystalline trimorphism (and higher order polymorphism). To ensure the accurate positioning of stable phase domains, a topological phase diagram needs to be consistent. This paper gives an example of how thermodynamic feedback can be used in the topological construction of phase diagrams to ensure overall consistency in a phase diagram based on the case of piracetam crystalline trimorphism.
© EDP Sciences, Springer-Verlag, 2017
