ATHENA MINERALOGY |
Mineral: | ANDESINE |
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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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