Galliskiite
Galliskiite is an IMA-recognized mineral species in the phosphate class, with the chemical formula Ca₄Al₂(PO₄)₂F₈·5H₂O.
It crystallizes in the triclinic crystal system (space group P-1).
Key properties: Mohs hardness 2.5; specific gravity 2.67; White streak; Vitreous luster; optically biaxial.
IMA symbol Glk, IMA status: approved, named in 2009.
A late-stage hydrothermal mineral that crystallized from fluorine-rich solutions in intragranitic pegmatite.
It is found associated with Morinite, strengite.
The mineral was named to honor Miguel Ángel Galliski (b. 1948).
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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