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Metahaiweeite: Ca(UO2)2Si6O15·n(H2O), n<5 Haiweeite: Ca[(UO2)2Si5O12(OH)2]·3(H2O)
Comments: Pale yellow scaly metahaiweeite coating on quartz with minute haiweeite acicular crystals.
Location: Coso Uranium Mine, Inyo County, California, USA.
Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species