Shlykovite
Shlykovite is an IMA-recognized mineral species in the silicate class, with the chemical formula KCa[Si₄O₉(OH)]·3H₂O.
It crystallizes in the monoclinic crystal system (space group P2_1/c).
Key properties: Mohs hardness 2.5–3; specific gravity 2.244; White streak; Vitreous; aggregates, pearly to silky luster; optically biaxial.
IMA symbol Skv, IMA status: approved, named in 2008.
A late-stage hydrothermal mineral along fractures in a high-potassium peralkaline pegmatite in urtite rocks near the contact with nepheline-apatite rock.
It is found associated with Cryptophyllite.
The mineral was named to honor geologist, Valeriy Georgievich Shlykov (1941-2007), Moscow State University, Russia.
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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