Uranoclite
Uranoclite is an IMA-recognized mineral species in the halide class, with the chemical formula (UO₂)₂(OH)₂Cl₂(H₂O)₄.
It crystallizes in the monoclinic crystal system (space group P2_1/n).
Key properties: Mohs hardness 1.5; specific gravity 4.038; Very pale yellow streak; Vitreous luster.
IMA symbol Uro, IMA status: approved, named in 2021.
Found in efflorescent crusts on mine walls by postmining oxidation of asphaltum-rich sandstone beds laced with uraninite and sulfides in a damp underground environment.
It is found associated with Gypsum, quartz.
The name refers to its composition as the first uranyl chloride mineral with no other anions other than hydroxyl.
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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