Koryakite
Koryakite is an IMA-recognized mineral species in the sulfate class, with the chemical formula NaKMg₂Al₂(SO₄)₆.
It crystallizes in the hexagonal crystal system (space group R-3). It is a member of the Millosevichite structural group.
Key properties: Mohs hardness 2–3; specific gravity 2.892; White streak; Vitreous luster; optically uniaxial.
IMA symbol Kyk, IMA status: approved, named in 2018.
Forms as a sublimate at an active volcanic fumarole.
It is found associated with Euchlorine, langbeinite.
The name refers to the Koryak, the original inhabitants living on the Kamchatka peninsula.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data — a full written entry hasn’t been published yet.
Browse more K minerals or help write this entry.