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New Data on Epidote-Supergroup Minerals: Unusual Chemical Compositions, Typochemistry, and Raman Spectroscopy

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Abstract

Compositional variations of the epidote-supergroup minerals from the different magmatic, metasomatic, and metamorphic formations of the Pelagonian Massif (Republic of North Macedonia), the Urals (Russia) and the Eifel Mountains (Germany) were studied. The new data on isomorphism in these minerals were obtained. Nine potentially new mineral species belonging to the epidote supergroup including the minerals, in which Cr, Ga, La, Ce, Nd, and Pb are the species-defining components, as well as a number of varieties with unusually high Zn and Cu contents, were identified. The relationship between the chemical composition of epidote-supergroup minerals and their Raman spectra is discussed.

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Funding

This study was supported by the Russian Foundation for Basic Research, project nos. 18-05-00051-a (study of the samples from the Nežilov area) and 18-29-12007_mk (study of other samples).

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Correspondence to D. A. Varlamov, V. N. Ermolaeva or N. V. Chukanov.

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Translated by A. Bobrov

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Varlamov, D.A., Ermolaeva, V.N., Chukanov, N.V. et al. New Data on Epidote-Supergroup Minerals: Unusual Chemical Compositions, Typochemistry, and Raman Spectroscopy. Geol. Ore Deposits 61, 827–842 (2019). https://doi.org/10.1134/S1075701519080130

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