Raman spectroscopy of garnet-group minerals

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Abstract

The Raman spectra of the natural end members of the garnet-group minerals, which include pyrope, almandine and spessarite of Fe-Al garnet series and grossularite, andradite and uvarovite of Ca-Fe garnet series, have been studied. Measured Raman spectra of these minerals are reasonably and qualitatively assigned to the internal modes, translational and rotatory modes of SiO4 tetrahedra, as well as the translational motion of bivalent cations in the X site. The stretch and rotatory Alg modes for the Fe-Al garnet series show obvious Raman shifts as compared with those for the Ca-Fe garnet series, owing to the cations residing in the X site connected with SiO4 tetrahedra by sharing the two edges. The Raman shifts of all members within either of the series are attributed mainly to the properties of cations in the X site for the Fe-Al garnet series and in the Y site for the Ca-Fe garnet series. © 1994 Institute of Geochemistry, Chinese Academy of Sciences.

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Mingsheng, P., Mao, H. K., Dien, L., & Chao, E. C. T. (1994). Raman spectroscopy of garnet-group minerals. Chinese Journal of Geochemistry, 13(2), 176–183. https://doi.org/10.1007/BF02838517

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