ATHENA MINERALOGY |
Mineral: | FERRIDRAVITE = POVONDRAITE, Fe rich DRAVITE or BUERGERITE |
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Formula: | (Na,K)(Mg,Fe2+)3Fe3+6(BO3)3Si6O18(O,OH)4 |
Crystal System: | Rhombohedral (Trigonal) |
Group: | Tourmaline group |
References: | AM 96 (2011), 895 |
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