umangiten.
/ˈjuːməŋɡʌɪt/ Mineralogy.
A copper selenide, Cu3Se2, found as dark red, violet, or black tetragonal crystals.
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the world > the earth > minerals > types of mineral > sulphides and related minerals > [noun] > other selenides
volcanite1848
zorgite1852
tiemannite1868
umangite1891
1891 Jrnl. Chem. Soc. 60 1435 The author has found three rare minerals of great interest... 2. Umangite.—Associated with eukairite, there occurs a mineral..which proved on analysis to be a variety of copper selenide... The new mineral occurs in finely granular masses.
1978 Mineral. Abstr. 29 198/2 Umangite (Cu3Se2), berzelianite (Cu2−xSe), and athabascaite (Cu5·1Se4) are found in fracture fillings in a carbonatized mafic intrusive rock from Christopher Island, Baker Lake, North West Territories.
This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018).
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n.1891