Following an isosymmetric phase transition by changes in bond lengths and anisotropic displacement parameters: the case of meta-carboxyphenylammonium phosphite.
Crystal structure studies in the 100-345 K temperature range were performed to relate the molecular structure changes of meta-carboxyphenylammonium phosphite (m-CPAMP) to its first-order phase transition at T(c) = 246 (2) K. Thermal displacement parameters and most bond distances show an abrupt jump at the transition. Such a structural change is related to collective effects leading to competition between intra- and intermolecular interactions.
Bendeif
El-Eulmi
el-E
Laboratoire de Cristallographie et Modélisation des Matériaux Minéraux et Biologiques LCM3B CNRS UMR 7036, Institut Jean Barriol Nancy Université, Faculté des Sciences, BP 239, 54506 Vandoeuvre-lès-Nancy CEDEX, France.
Lecomte
Claude
C
Dahaoui
Slimane
S