Filatovite
Filatovite is an IMA-recognized mineral species in the silicate class, with the chemical formula K(Al,Zn)₂(As,Si)₂O₈.
It crystallizes in the monoclinic crystal system (space group I2/c). It is a member of the Feldspar structural group.
Key properties: Mohs hardness 5–6; specific gravity 2.92; White streak; Vitreous luster; optically biaxial.
IMA symbol Ftv, IMA status: approved, named in 2002.
A product of fumarolic activity.
It is found associated with Alumokluchevskite, lammerite, johillerite, sylvite, hematite, tenorite, As-bearing orthoclase.
The mineral was named to honor Stanislav K. Filatov (b. 1940), Saint Petersburg State University, for his studies of exhalation minerals.
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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