Leydetite
Leydetite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Fe(UO₂)(SO₄)₂·11H₂O.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Leydetite structural group.
Key properties: Mohs hardness 2; specific gravity 2.55; Yellowish white streak; Vitreous luster; optically biaxial.
IMA symbol Ley, IMA status: approved, named in 2012.
Found as a secondary mineral in the oxidized zone of a uranium deposit.
It is found associated with Pyrite, uraninite, calcite, quartz, unspecified clay minerals, gypsum, deliensite.
The mineral was named to honor Jean-Claude Leydet (b.1961), an amateur mineralogist and mineral collector from Brest, France, who discovered the new mineral.
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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