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gedrite

An orthorhombic mineral, (Mg,Fe)5Al2(Si6Al2O22)(OH)2; amphibole group, with Mg/(Mg + Fe) = 0.1-0.89; forms series with magnesiogedrite and ferrogedrite; common in schists, gneisses, and metasomatic rocks.

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  • ed.young
  • (Milwaukee, United States)

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