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Magnesiozippeite: Mg(H2O)3.5(UO2)2(SO4)O2 Marecottite: Mg3(H2O)18[(UO2)4O3(SO4)2]2·10(H2O)
Comments: Powdery and crystalline aggregates of red-brown marecottite and yellow magnesiozippeite on matrix.
Location: Svornost Mine, Jachymov, Bohemia, Czech Republic.
Scale: Specimen Size 6.5x9 cm.
© Diederik Visser