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ATHENA

MINERALOGY

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Mineral: BARROISITE
Formula: ▢(CaNa)Mg3AlFe3+Si7AlO22(OH)2
Crystal System: Monoclinic
Group: Amphibole supergroup, with (OH,F,Cl) dominant. Na-Ca subgroup. Barroisite group
IMA Number: 2012 s.p.
References: AM 63 (1978), 1023; HB2/1 (1995)
Comments: ▢ = vacancy

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