Articles | Volume 38, issue 4
https://doi.org/10.5194/ejm-38-531-2026
https://doi.org/10.5194/ejm-38-531-2026
New minerals, nomenclature, and classification
 | 
19 Aug 2026
New minerals, nomenclature, and classification |  | 19 Aug 2026

Belmonteite, CaMn2(AsO4)2(H2O)5 ⋅ 2H2O, a new arsenate mineral from the Mn ore deposits of the Graveglia Valley, eastern Liguria, Italy

Cristian Biagioni, Jiří Sejkora, and Zdeněk Dolníček

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Cited articles

Antofilli, M., Borgo, E., and Palenzona, A.: I nostri minerali, Geologia e mineralogia in Liguria, Sagep, Genova, 295 pp., 1983. 
Basso, R., Lucchetti, G., and Palenzona, A.: Gravegliaite, MnSO33H2O, a new mineral from Val Graveglia (Northern Apennines, Italy), Z. Kristallogr., 197, 97–106, 1991. 
Basso, R., Lucchetti, G., Zefiro, L., and Palenzona, A.: Reppiaite, Mn5(OH)4(VO4)2, a new mineral from Val Graveglia (Northern Apennines, Italy), Z. Kristallogr., 201, 223–234, 1992. 
Basso, R., Lucchetti, G., Zefiro, L., and Palenzona, A.: Vanadomalayaite, CaVOSiO4, a new mineral vanadium analog of titanite and malayaite, N. Jahr. Mineral. Monat., 1994, 489–498, 1994. 
Basso, R., Lucchetti, G., Martinelli, A., and Palenzona, A.: Cavoite, CaV3O7, a new mineral from the Gambatesa mine, northern Apennines, Italy, Eur. J. Mineral., 15, 181–184, 2003. 
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Short summary
Belmonteite, CaMn2(AsO4)2(H2O)5·2H2O, is a new mineral discovered in the Mn ore deposits of eastern Liguria (Italy). Its crystal structure shows {010} layers of six-fold-coordinated Mn atoms decorated on both sides by (AsO4) groups and Ca atoms and connected through H bonds. The genesis of this mineral is related to the circulation of As-rich oxidizing fluids within the Mn ore deposits. The name honors Donato Belmonte for his contribution to the knowledge of the mineralogy of Liguria.
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