Heklaite
Heklaite is an IMA-recognized mineral species in the halide class, with the chemical formula KNaSiF₆.
It crystallizes in the orthorhombic crystal system (space group Pnma).
Key properties: specific gravity 2.69; White streak; Vitreous luster.
IMA symbol Hek, IMA status: approved, named in 2008.
A sublimate precipitated around fumaroles emitting F-rich volcanic gases.
It is found associated with Ralstonite, malladrite, hieratite, jakobssonite.
The name refers to the Hekla volcano, Iceland, where the first specimens were collected.
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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