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ATHENA MINERALOGY |
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ATHENA MINERALOGY |
| Mineral: | PRINCIVALLEITE |
|---|---|
| Formula: | Na(Mn2Al)Al6(Si6O18)(BO3)3(OH)3O |
| Crystal System: | Rhombohedral (Trigonal) |
| Group: | Tourmaline group |
| IMA Number: | 2020-056 |
| References: | EJM 32 (2020), 645-651; MM 86/1 (2022), 78 |
| Type Locality: | Along the cut of a small road, eastern side of Curiglia, Veddasca Valley, Luino (Varese), Lombardia, Italy |
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