Black crystals of the rare amphibole mineral potassic-ferro-ferri-taramite in a whitish contrasting matrix from the TL in Somalialand (Mohlileh Hill, Darkainle Complex,Borama District, Awdal, Somaliland). Ex Vandenbroucke Museum collection from Waregem, Belgium. — Photo: David Hospital · CC BY-SA 4.0
Ferri-taramite
Ferri-taramite is an IMA-recognized mineral species in the silicate class, with the chemical formula Na(NaCa)(Mg₃Fe³⁺₂)(Si₆Al₂)O₂₂(OH)₂.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Amphibole structural group.
IMA symbol Fi-trm, IMA status: approved, named in 2021.
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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