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ATHENA

MINERALOGY

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Mineral: KEYSTONEITE
Formula: Mg0,5[Ni2+Fe3+(TeO3)3].4,5H2O
Crystal System: Hexagonal
Group: Zemannite group
IMA Number: 1987-049
References: EJM 7 (1995), 509; HB5 (2003); CM 59 (2021), 355
Type Locality: Keystone mine, Magnolia distr., Boulder Co., Colorado, USA

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