Zeravshanite
Zeravshanite is an IMA-recognized mineral species in the silicate class, with the chemical formula Na₂Cs₄Zr₃Si₁₈O₄₅·2H₂O.
It crystallizes in the monoclinic crystal system (space group C2/c).
Key properties: Mohs hardness 6; specific gravity 3.09; Vitreous luster; optically biaxial.
IMA symbol Zer, IMA status: approved, named in 2003.
A pegmatite mineral in a quartz rock fragment in glacial sediment derived from an alkaline massif.
It is found associated with Intergrowth with pectolite; quartz, aegirine, pectolite, polylithionite, reedmergnerite, pectolite, fluorite, stillwellite-(Ce), leucosphenite, neptunite.
The name is derived from the locality, Zeravshan Range, that produced the first specimens.
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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