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Mineralogical exhibition of Mátra Museum

Mineralogical exhibition of Mátra Museum. Minerals of Miocene rhyolites. Minerals of Miocene rhyolites. 1. Manganese-oxyde. 2. Tridymite (SiO 2 ). 3. Opal (SiO 2 ∙nH 2 O) and Goethite [ a-FeO (OH)]. 4. Opal (SiO 2 ∙nH 2 O) and Nontronite

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Mineralogical exhibition of Mátra Museum

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  1. Mineralogicalexhibition of Mátra Museum

  2. Minerals of Miocenerhyolites

  3. Minerals of Miocenerhyolites

  4. 1. Manganese-oxyde

  5. 2. Tridymite (SiO2)

  6. 3. Opal (SiO2∙nH2O) and Goethite [a-FeO(OH)]

  7. 4. Opal (SiO2∙nH2O) and Nontronite [(Na, Ca0,5)0,33(Fe3+,Al)2(Si,Al)4O10(OH)2∙nH2O]

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