This article is part of the Journal of Raman Spectroscopy special issue entitled “Raman spectroscopy in art and archaeology” edited by Juan Manuel Madariaga and Danilo Bersani.
Simulation of vibrational spectra of crystals by ab initio calculations: an invaluable aid in the assignment and interpretation of the Raman signals. The case of jadeite (NaAlSi2O6)†
Version of Record online: 20 JUL 2012
Copyright © 2012 John Wiley & Sons, Ltd.
Journal of Raman Spectroscopy
Special Issue: Raman spectroscopy in art and archaeology
Volume 43, Issue 11, pages 1567–1569, November 2012
How to Cite
Prencipe, M. (2012), Simulation of vibrational spectra of crystals by ab initio calculations: an invaluable aid in the assignment and interpretation of the Raman signals. The case of jadeite (NaAlSi2O6). J. Raman Spectrosc., 43: 1567–1569. doi: 10.1002/jrs.4040
- Issue online: 21 NOV 2012
- Version of Record online: 20 JUL 2012
- Manuscript Accepted: 30 JAN 2012
- Manuscript Revised: 24 JAN 2012
- Manuscript Received: 6 DEC 2011
- Raman spectra;
- ab initio simulations;
Raman shifts of crystalline materials can reliably be evaluated at the ab initio level, provided that suitable Hamiltonians, like the hybrid Hartree–Fock/density functional theory ones, are employed in the calculation. The Raman shifts of jadeite (NaAlSi2O6) were obtained by using the WC1LYP hybrid Hamiltonian, and the results are compared with those available for experimental determinations. The average discrepancy between the experimental and calculated data is less than 4 cm–1, with positive and negative maximum discrepancies of 5.5 and −10.5 cm–1, respectively. Such results are useful (i) for the correct assignment of the observed Raman signals to fundamental vibrational modes; (ii) for the identification of modes too weak to be detected experimentally, and (iii) for the deconvolution of bands resulting from the overlap of several modes in the experimental spectra. Moreover, the attribution of each observed signal to a particular motion of the atoms in the structure has been performed and discussed. Copyright © 2012 John Wiley & Sons, Ltd.