The varennesite spans ~ 4¼ x 3½ mm. Found Sept 2000. From: Demix-Varennes quarry, Saint-Amable sill, Varennes & St-Amable, Lajemmerais RCM, Montérégie, Québec, Canada. — Photo: Modris Baum · CC0
Varennesite
Varennesite is an IMA-recognized mineral species in the silicate class, with the chemical formula Na₈Mn₂Si₁₀O₂₅(OH,Cl)₂·12H₂O.
It crystallizes in the orthorhombic crystal system (space group Cmcm).
IMA symbol Vrn, IMA status: approved, named in 1994.
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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