英语词汇“umangite”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	umangite
释义	umangite Min.\|ˈjuːməŋgaɪt\| [ad. G. umangit (F. Klockmann 1891, in Zeitschr. f. Krist. und Min. XIX. 265), f. the name of Sierra de Umango in Argentina: see -ite¹.] A copper selenide, Cu₃Se₂, found as dark red, violet, or black tetragonal crystals. 1891Jrnl. Chem. Soc. LX. 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.1978Mineral. Abstr. XXIX. 198/2 Umangite (Cu₃Se₂), berzelianite (Cu_2-_xSe), and athabascaite (Cu_5·1Se₄) are found in fracture fillings in a carbonatized mafic intrusive rock from Christopher Island, Baker Lake, North West Territories.
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