Polarized Raman spectra of beryl and bazzite |
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| Authors: | H Hagemann A Lucken H Bill J Gysler-Sanz H A Stalder |
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| Institution: | 1. Department of Physical Chemistry, University of Geneva, 30 quai E. Ansermet, 4, Geneva, Switzerland
2. Naturhistorisches Museum Bern, Bernastrasse 15, CH-3005, Bern, Switzerland
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| Abstract: | The polarized Raman spectra of four different beryl crystals were studied at room temperature in the range from 30 to 4000 cm-1. The spectra show significant differences between the samples studied, and corrections are proposed for the reference Raman spectra of beryl previously reported by Adams and Gardner (1974). Type II water is observed in two crystals; the corresponding symmetric Raman stretching band at 3595 cm-1 is extremely strong for an impurity (about 20% of the strongest beryl lattice mode). Another, sharper, band of similar intensity at 3605 cm-1 could possibly originate from a hydroxyl stretching mode. Additional weaker bands are observed around 1600 cm-1 and 3600–3750 cm-1. The first polarized Raman spectra of bazzite are presented and discussed. |
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