Reddish veinlets and microcrystals of the very rare mineral mangano-mangani-ungarettite from the type locality in Australia (Hoskins Mine, Grenfell, New South Wales, Australia) and only one of the two known localities worldwide. Two sides of the specimen are polished, probably because it was analyzed. Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Mangano-mangani-ungarettiite
Mangano-mangani-ungarettiite is an IMA-recognized mineral species in the silicate class, with the chemical formula NaNa₂(Mn²⁺₂Mn³⁺₃)Si₈O₂₂O₂.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Amphibole structural group.
IMA symbol Mmu, 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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