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Phase transition at 233 K in [(CH3)4N]2cdI4 |
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| Authors: | A. Kallel M. Borg H. Fuess S. Boutiba |
| Affiliation: | 1. Département de Physique , Faculté des Sciences de Tunis, Le Bélvédére , 1060, Tunis, Tunisia;2. Strukturforschung FB Materialwissenschaft, Technische Hochschule, Darmstadt, FRG;3. Département de Physique , ENSET, Tunis, Tunisia |
| Abstract: | Abstract [(CH3)4N]2cdI4 exhibits a phase transition at 233 K from Pnma to P2 1/c as shown by single-crystal X-ray measurements and differential scanning calorimetry. The observed entropy change amounts to approximately 8.4 J.mole?1 K?1 and the spontaneous strain is about – 18.10?3. The symmetry change can be interpreted in the framework of the Landau theory. |
| Keywords: | Differential scanning calorimetry X-ray diffraction phase transition Landau theory |