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Formula: Cu2SnSe3
Selenide, forms a solid solution with
mohite
Crystal System: Monoclinic
Specific gravity: 5.126 calculated for the empirical formula
Environments
Okruginite is a new mineral, approved in 2022 and to date (March 2024) reported only from the type locality.
Localities
At the type locality, the Ozernovskoe deposit, Karaginsky District, Koryak Okrug, Kamchatka Krai, Russia,
okruginite has been discovered in the high-sulfidation epithermal gold
deposit. It occurs as distinct selenium-rich zones in
selenium-bearing mohite crystals or
forms aggregates of small crystals 10–15 μm in size in quartz
(MM 88.1.31-39).
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