A large (for the species) cleavage / crystal fragment, acquired from A. Petrov at the 2015 Liège show. Collection and photo Erik Vercammen. Locality: Greenwood mine, Town of Tuxedo, Orange Co., New York, USA. — Photo: Erik Vercammen · CC BY 3.0
Potassic-fluoro-hastingsite
Potassic-fluoro-hastingsite is an IMA-recognized mineral species in the silicate class, with the chemical formula KCa₂(Fe²⁺₄Fe³⁺)(Si₆Al₂)O₂₂F₂.
It crystallizes in the monoclinic crystal system (space group C2/m). It is a member of the Amphibole structural group.
IMA symbol Pfhst, IMA status: approved, named in 2005.
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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