European Journal of Mineralogy
European Journal of Mineralogy
European Journal of Mineralogy
Articles | Volume 37, issue 5
Articles | Volume 37, issue 5
https://doi.org/10.5194/ejm-37-733-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ejm-37-733-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 37, issue 5
New minerals, nomenclature, and classification
 | 
14 Oct 2025
New minerals, nomenclature, and classification |  | 14 Oct 2025

Marioantofilliite, [Cu4Al2(OH)12](CO3) ⋅ 3H2O, a new member of the hydrotalcite supergroup from Liguria (Italy)

Cristian Biagioni, Jiří Sejkora, Natale Perchiazzi, Enrico Mugnaioli, Daniela Mauro, Donato Belmonte, Radek Škoda, and Zdeněk Dolníček

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Short summary
Marioantofilliite, ideally [Cu4Al2(OH)12](CO3)•3H2O, is a new member of the hydrotalcite supergroup occurring as a supergene mineral in the Cu–Fe deposit of Monte Copello–Reppia (Liguria, Italy). Its name honours Mario Antofilli (1920–1983) for his contribution to the knowledge of the mineralogy of Liguria. Its discovery and description improve the knowledge of layered double hydroxides (LD), with implications for the group of Cu–Al LDH actively studied for its technological properties. 
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