Genplesite
A very rare tin sulfate from the Noril'sk nickel deposit in Russia.
Intro adapted from Wikipedia (CC BY-SA).
Genplesite is an IMA-recognized mineral species in the sulfate class, with the chemical formula Ca₃Sn(SO₄)₂(OH)₆·3H₂O.
It crystallizes in the hexagonal crystal system (space group P6_3/mmc). It is a member of the Fleischerite structural group.
Key properties: Mohs hardness 3; specific gravity 2.78; White streak; Vitreous luster; optically uniaxial.
IMA symbol Gpl, IMA status: approved, named in 2014.
A late-stage, low-temperature hydrothermal mineral in cavities in massive chalcopyrite.
It is found associated with Greenalite, chamosite, pectolite, ferroactinolite, calcite, fluorapatite.
The mineral was named to honor Gennadiy Nikolaevich Plesin (b. 1963).