Crystal structure and phase transition of the quinolinium tetrabromothallate(III) - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Phase Transitions Année : 2008

Crystal structure and phase transition of the quinolinium tetrabromothallate(III)

Résumé

The salt quinolinium tetrabromothallate(III) is orthorhombic Pna2(1) with the following unit cell dimensions: a = 9.582(2), b = 10.0210(19), c = 14.916(2) angstrom, Z = 4. The structure was solved by Patterson methods and refined to a final R-value of 0.0452 for 2043 observed reflections. The examination of the structure shows quinolinium cations separating chains of tetrahedral TlBr4-, these chains are perpendicular to the c axis. Infrared spectra confirms the presence of the organic cations, differential scanning calorimetry reveals a transition at T = 406 K. Electrical measurements and X-ray powder diffraction were performed to discuss the mechanism of the phase transition.

Domaines

Cristallographie
Fichier non déposé

Dates et versions

hal-00257744 , version 1 (20-02-2008)

Identifiants

Citer

Najla N. Chaari, Slaheddine Chaabouni, Nassira Chniba-Boudjada, Z. Abdelkefi, Pierre Bordet. Crystal structure and phase transition of the quinolinium tetrabromothallate(III). Phase Transitions, 2008, 81 (1), pp.101-111. ⟨10.1080/01411590701517170⟩. ⟨hal-00257744⟩

Collections

UGA CNRS NEEL
132 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More