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ATHENA

MINERALOGY

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Mineral: MANGANIECKERMANNITE
Name: Mangani-eckermannite
Formula: NaNa2(Mg4Mn3+)Si8O22(OH)2
Crystal System: Monoclinic
Group: Amphibole supergroup, with (OH,F,Cl) dominant. Amphibole Na subgroup. Eckermannite group
IMA Number: 2023-004
References: EJM 35/3 (2023), 397; MM 87 (2023), 935
Type Locality: Tanohata mine, no. 3 orebody (also known as Matsumaezawa pit), Shimohei District, Iwate Prefecture, Japan

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