Schoepite, empirical formula (UO₂)₈O₂(OH)₁₂·12(H₂O)
/ref> is a rare alteration product of uraninite in hydrothermal uranium deposits. It may also form directly from ianthinite. The

mineral In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid substance with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. (2011): Mi ...

presents as a transparent to translucent yellow, lemon yellow, brownish yellow, or amber orthorhombic tabular crystals. Although over 20 other crystal forms have been noted; rarely in microcrystalline aggregates. When exposed to air schoepite converts over a short time to the metaschoepite form (UO₃·H₂O, ) within a few months of being exposed to ambient air.Mindat.org
/ref> The hardness is 2.5, density is 4.8 g/cm³, and it streaks yellow. It was first described from specimens from Shinkolobwe mine in Belgian Congo in 1923, several additional localities are known. Schoepite was named to honor Alfred Schoep (1881–1966), Professor of Mineralogy at the University of Ghent,

Belgium Belgium, officially the Kingdom of Belgium, is a country in Northwestern Europe. Situated in a coastal lowland region known as the Low Countries, it is bordered by the Netherlands to the north, Germany to the east, Luxembourg to the southeas ...

.Webmineral data
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References

Uranium(VI) minerals Oxide minerals Orthorhombic minerals Minerals in space group 29 {{Oxide-mineral-stub