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Haiweeite: Ca[(UO2)2Si5O12(OH)2]·3(H2O)
Comments: Yellow, spherical, aggregates of acicular haiweeite with clear calcite scalenohedrons. Location: Teofilo Otoni, Minas Gerais, Brazil.. Scale: Picture size 1 cm. © Paul M. Schumacher
Comments: Minute divergent acicular crystals of white haiweeite on matrix. Location: Coso Uranium Mine, Inyo County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Haiweeite: Ca[(UO2)2Si5O12(OH)2]·3(H2O) Metahaiweeite: Ca(UO2)2Si6O15·n(H2O), n<5
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