Geschieberite
Geschieberite is an IMA-recognized mineral species in the sulfate class, with the chemical formula K₂(UO₂)(SO₄)₂·2H₂O.
It crystallizes in the orthorhombic crystal system (space group Pna2_1).
Key properties: Mohs hardness 2; specific gravity 3.259; Greenish white streak; Vitreous luster; optically biaxial.
IMA symbol Gsb, IMA status: approved, named in 2014.
Found as a weathering product from the post-mining alteration of uraninite and sulfides in a Ag-Bi-Co-Ni-U bearing hydrothermal vein deposit.
It is found associated with Svornostite, adolfpateraite, gypsum, mathesiusite.
The name refers to the Geschieber vein, the locality that produced the first specimens.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
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