Outstanding yellow brown sharp crystals of the rare mineral ferri-ghoseite from Italy (Varenche Mine, Saint-Barthélemy, Nus, Aosta Valley, Italy). Ex Vandenbroucke Museum collection specimen, from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Ferri-ghoseite
Ferri-ghoseite is an IMA-recognized mineral species in the silicate class, with the chemical formula (NaMn²⁺)(Mg₄Fe³⁺)Si₈O₂₂(OH)₂.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Amphibole structural group.
IMA symbol Fgh, IMA status: approved, named in 1993.
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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