Articles | Volume 36, issue 5
https://doi.org/10.5194/ejm-36-863-2024
https://doi.org/10.5194/ejm-36-863-2024
Research article
 | 
19 Sep 2024
Research article |  | 19 Sep 2024

Bonacinaite, Sc(AsO4)  ⋅  2H2O, the first scandium arsenate

Marco E. Ciriotti, Uwe Kolitsch, Fernando Cámara, Pietro Vignola, Frédéric Hatert, Erica Bittarello, Roberto Bracco, and Giorgio Maria Bortolozzi

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Bonacinaite, Sc(AsO4)∙2H2O, the first scandium arsenate Marco E. Ciriotti https://www.amimineral.org/

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Short summary
The article provides the standard description of bonacinaite, Sc3+(AsO4)·2H2O, the first natural scandium arsenate. The new mineral species was found in a few specimens in the dumps of the old Varenche Mine, Valle d'Aosta, Italy, which is therefore the type locality and the only locality in the world. Bonacinaite forms colourless (with faint to distinct violet tints), pseudohexagonal, thick tabular crystals, up to 0.25 mm in size, or as small, faintly violet lath-shaped crystals.