Journées d'Étude des Équilibres entre Phases

J. Phys. IV France 11 (2001) Pr10-41-Pr10-45
DOI: 10.1051/jp4:20011005

Le solvate C₆₀,2S₈ : mystères et certitudes

H. Szwarc¹, A.-S. Grell², F. Masin², J.L.I. Tamarit³, J.C. van Miltenburg⁴, H. Allouchi⁵, V. Agafonov⁵, J. Rodriguez-Carvajal⁶ and R. Céolin<sup>7

1</sup>  Laboratoire de Chimie Physique, UMR 8000 du CNRS, bâtiment 490, Université Paris-Sud, 91405 Orsay, France
²  Université Libre de Bruxelles, CP. 232, boulevard du Triomphe, 1050 Bruxelles, Belgium
³  Departament de Fisica i Enginyeria Nuclear, ETSEIB, Grup d'Aliatges Moleculars, Universitat Politècnica de Catalunya, Diagonal 647, 08028 Barcelona, Catalonia, Spain
⁴  Chemical Thermodynamics Group, State University Utrecht, Padualaan 8, 3584 Utrecht, The Netherlands
⁵  Laboratoire de Chimie Physique, Faculté de Pharmacie, 31 avenue Monge, 37200 Tours, France
⁶  Laboratoire Léon Brillouin, CEN-Saclay, 91191 Gif-sur-Yvette cedex, France
⁷  Laboratoire de Chimie Physique, Faculté de Pharmacie, 4 avenue de l'Observatoire, 75270 Paris cedex 06, France

Abstract
In the C₆₀.2S₈ solvate, thermodynamic data seem to indicate that the excess interactions between the S₈ cycles and the C₆₀ molecules, with respect to interactions in pure sulfur, are negligible which contradicts structural data and milling experiments. Furthermore, calorimetric measurements fail to detect any phase or glass transitions which are to be expected according to NMR and neutron spectroscopies.

© EDP Sciences 2001