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ATHENA

MINERALOGY

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Mineral: ANDESINE
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Crystal System: Anorthic (Triclinic)
Group: Feldspar group. Plagioclase series. Albite-Anorthite series
References: ZK 178 (1987), 207; HB2/1 (1995)
Type Locality: Marmato, Cauca, Andes Mts, Colombia
Comments: A plagioclase feldspar; An30Ab70 to An50Ab50. Variety of albite

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