Some selenide minerals include ferroselite and umangite.
2.
Ferroselite was first reported in 1955 for an occurrence in the Ust-Uyuk uranium deposit in Tuva, Siberia.
3.
In the frame of safety assessment calculations made for deep disposal of high-level radioactive waste, ferroselite and dzharkenite are also considered in geochemical calculations as one of the mineral phases limiting the solubility of Selenium-79.
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