Presented as part of a commemorative issue for Wolfgang Kiefer on the occasion of his 65th birthday.
Polarized Raman spectra of Gd2(MoO4)3 in its orthorhombic structure†
Article first published online: 12 JAN 2006
Copyright © 2006 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Special Issue: Commemorative Issue: for Wolfgang Kiefer on the Occasion of his 65th Birthday
Volume 37, Issue 1-3, pages 189–201, January - March 2006
How to Cite
Guy, L. and Denis, M. (2006), Polarized Raman spectra of Gd2(MoO4)3 in its orthorhombic structure. J. Raman Spectrosc., 37: 189–201. doi: 10.1002/jrs.1456
- Issue published online: 12 JAN 2006
- Article first published online: 12 JAN 2006
- Manuscript Accepted: 20 JUL 2005
- Manuscript Received: 25 APR 2005
- solid state;
- phase transitions;
- orthorhombic structure
Polarized Raman spectra of a single crystal of gadolinium molybdate, Gd2(MoO4)3 were obtained between 400 and 80 K. Tentative assignments of high-wavenumber bands of symmetric and antisymmetric MoO4 stretching modes to the three types of tetrahedra present in the ferroelectric phase described by the C2v8 space group are made on the oriented gas model. A careful analysis of the low-wavenumber spectra allowed identification of new bands compared to those in the literature. The evolution of wavenumbers in the investigated temperature range indicates that a small structural change takes place at about 200 K. Some modes soften when approaching the ferroelectric–paraelectric transition at 159 °C. Copyright © 2006 John Wiley & Sons, Ltd.