Haiweeite is a mineral of uranium and has the chemical formula: Ca[(UO2)2Si5O12(OH)2]·3(H2O). It is a secondary mineral of uranium, a product of oxidation. It has a greenish yellow color. It has a Mohs hardness of about 3.5 and is fluorescent under UV light.

Haiweeite
General
CategoryNesosilicate
Formula
(repeating unit)
Ca[(UO2)2Si5O12(OH)2]·3(H2O)
IMA symbolHwe[1]
Strunz classification9.AK.25
Dana classification53.3.2.2
Crystal systemOrthorhombic
Crystal classDipyramidal (mmm)
Space groupOrthorhombic
H-M symbol: (2/m 2/m 2/m)
Space group: Pbcn
Identification
Other characteristics Radioactive

It was named after the Haiwee Reservoir, Inyo County, California, US, where it was first found.

References

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  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.