Articles | Volume 38, issue 2
https://doi.org/10.5194/ejm-38-153-2026
https://doi.org/10.5194/ejm-38-153-2026
New minerals, nomenclature, and classification
 | 
01 Apr 2026
New minerals, nomenclature, and classification |  | 01 Apr 2026

When mineralogy meets the organic chemistry: delchiaroite, Cu3I(CH3S)2, the first copper iodide–methanethiolate from the Carrara marble quarries, Apuan Alps, Tuscany, Italy

Cristian Biagioni, Jiří Sejkora, Yves Moëlo, Antonino Criscuolo, and Zdeněk Dolníček

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Cited articles

Allkins, J. R. and Hendra, P. J.: The infra-red and Raman spectra of dimethyl sulphide, selenide and telluride, Spectrochim. Acta, 22, 2075–2081, 1966. 
Andreu, E., Torró, L., Proenza, J. A., Domenech, C., García-Casco, A., Villanova de Benavent, C., Chavez, C., Espaillat, J., and Lewis, J. F.: Weathering profile of the Cerro de Maimón VMS deposit (Dominican Republic): textures, mineralogy, gossan evolution and mobility of gold and silver, Ore Geol. Rev., 65, 165–179, 2015. 
Andrew, C. R., Yeorn, H., Selverstone Valentine, J., Karlsson, B. G., Bonander, N., van Pouderoyen, G., Canters, G. W., Loehr, T. M., and Sanders-Loehr, J.: Raman spectroscopy as an indicator of Cu–S bond length in Type 1 and Type 2 copper cysteinate proteins, J. Am. Chem. Soc., 116, 11489–11498, 1994. 
Baumgartner, M., Schmalle, H. W., and Baerlocher, C.: Synthesis, characterization, and crystal structure of three homoleptic copper(I) thiolates: (Cu(CH3S)), [(C6H5)4P+]2[Cu5(CH3S)7]  C2H6O2, and [(C3H7)4N+]2[Cu4(CH3S)6 CH4O, J. Solid St. Chem., 107, 63–75, 1993. 
Biagioni, C., Orlandi, P., Camarda, S., Chinellato, M., Appiani, R., Del Chiaro, L., and Sanguineti, G.: Minerals from marbles of Carrara and the Apuan Alps, LoGisma Editore, Florence, 144 pp., ISBN: 978-88-94926-15-6, 2019. 
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Short summary
Delchiaroite is the first iodide–methanethiolate mineral and represents an interesting example where organic chemistry meets mineralogy.
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