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| A Mixture Of: | Goethite, Kaolinite, Nontronite | ||
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A mixture of an iron-bearing Kaolinite plus Goethite and 10-15% Nontronite. [Clark, 1993 - "Hey's Mineral Index"] Originally described from Faratsiho, Faratsiho Department, Vakinankaratra Region (Betafo - Antsirabé region), Antananarivo Province, Madagascar. | |||
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