Structural phase transition in [NH3(CH2)5NH3]BiCl5: thermal and vibrational studies
Article first published online: 24 AUG 2005
Copyright © 2005 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Volume 36, Issue 11, pages 1023–1028, November 2005
How to Cite
Jeghnou, H., Ouasri, A., Rhandour, A., Dhamelincourt, M. C., Dhamelincourt, P., Mazzah, A. and Roussel, P. (2005), Structural phase transition in [NH3(CH2)5NH3]BiCl5: thermal and vibrational studies. J. Raman Spectrosc., 36: 1023–1028. doi: 10.1002/jrs.1400
- Issue published online: 25 OCT 2005
- Article first published online: 24 AUG 2005
- Manuscript Accepted: 30 JUN 2005
- Manuscript Received: 16 FEB 2005
- halogenobismuthate (III);
- x-ray diffraction;
An x-ray diffraction study carried out on the pentylenediammonium pentachlorobismuthate (III) compound [NH3(CH2)5NH3]BiCl5 indicated that it is orthorhombic with a P212121(Z = 4) space group. Differential scanning calorimetry (DSC), differential thermal analysis (DTA) and thermogravimetric analysis (TGA) were also made, which showed that this compound undergoes a unique phase transition at high temperatures. The infrared and Raman spectra recorded at room temperature were interpreted on the basis of data published in the literature. The Raman bands observed below 300 cm−1 are very characteristic of the anions, which are made of isolated (BiCl52− )n units composed of BiCl63− octahedra. Raman spectra recorded at various temperatures confirmed the contribution to the phase-transition mechanism of both the anion and cation motions. Copyright © 2005 John Wiley & Sons, Ltd.