Lussierite
Lussierite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Na₁₀[(UO₂)(SO₄)₄](SO₄)₂(H₂O)₃.
It crystallizes in the monoclinic crystal system (space group Cc).
Key properties: Mohs hardness 2.5; specific gravity 2.87; White streak; Vitreous luster; optically biaxial.
IMA symbol Lsi, IMA status: approved, named in 2018.
Post-mining, secondary, as efflorescent crusts on the surfaces of mine walls from the oxidation of primary uranium ores in a humid underground environment.
It is found associated with Belakovskiite, ferrinatrite, halite, ivsite, metavoltine, thénardite.
The mineral was named to honor Canadian mineralogist Aaron J. Lussier (b. 1980), Research Scientist, Canadian Museum of Nature.
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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