Demartinite
Demartinite is an IMA-recognized mineral species in the halide class, with the chemical formula K₂SiF₆.
It crystallizes in the hexagonal crystal system (space group P6_3mc).
Key properties: specific gravity 2.85; optically uniaxial.
IMA symbol Dma, IMA status: approved, named in 2006.
Near volcanic fumaroles.
It is found associated with Hieratite, avogadrite, knasibfite.
The mineral was named to honor Francesco Demartin (b. 1953), Professor of General and Inorganic Chemistry, State University of Milan, Italy.
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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