Erikjonssonite
Erikjonssonite is an IMA-recognized mineral species in the silicate class, with the chemical formula (Pb₃₂O₂₁)[(V,Si,Mo,As)O₄]₄Cl₉.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Hereroite structural group.
Key properties: Mohs hardness 2.5; specific gravity 7.967.
IMA symbol Ejs, IMA status: approved, named in 2018.
Found in late-stage, zoned veins crosscutting primary hausmannite ores.
It is found associated with Hausmannite, calcite, glaucochroite, baryte, cerussite.
The mineral was named to honor Swedish mineralogist Erik Jonsson (b. 1967), Senior Geologist, Geological Survey of Sweden, Department of Mineral Resources, and Adjunct Professor.
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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