Haiweeite

minerals

Images
Formula: Ca(UO2)2(Si5O12)(OH)2.6H2O
Nesosilicate (insular SiO4 groups)
Specific gravity: 3.35
Hardness: 3½
Streak: White
Colour: Pale yellow, greenish-yellow
Environments

Plutonic igneous environments
Pegmatites

Haiweeite is a secondary oxidation product (Webmin).

Localities

At Bad Gastein, Saltzburg, Austria, haiweeite occurs in gneiss (Dana).

At Perus, São Paulo, Brazil, haiweeite occurs along fractures in tourmaline-bearing granite and granite pegmatites, associated with autunite, meta-autunite, uranophane, uranophane-β, phosphuranylite, torbernite, metatorbernite, chernikovite and uranian opal (AM 54.966-968).

At the type locality, Haiwee reservoir, Inyo county, California, USA, haiweeite occurs on fracture surfaces in granite and voids in lake-bed sediments (AM 44.839-843).

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