Mourite
Mourite is an IMA-recognized mineral species in the oxides & hydroxide class, with the chemical formula (UO₂)(Mo⁶⁺)₅O₁₆·5H₂O.
It crystallizes in the monoclinic crystal system.
Key properties: Mohs hardness 3; specific gravity 3.78–4.12; Blue-violet streak; Adamantine luster; optically biaxial.
IMA symbol Mou, IMA status: approved, named in 1962.
Found in the oxidized zone of a U–Mo deposit (Kyzylsai deposit, Kazakhstan); in a sandstone-hosted uranium deposit (Boso-Hackney prospect, Texas, USA).
It is found associated with Uraninite, molybdenite, jordisite, ilsemannite, pyrite, umohoite, sedovite, iriginite, powellite, sodium uranospinite, uranophane, tyuyamunite, goethite.
The name refers to MOlybdenum and URanium in the composition.
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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