| 单词 | psilomelanite |
| 释义 | > as lemmaspsiloˈmelanite psiloˈmelanite n. now rare = main sense. ΚΠ 1837 J. D. Dana Syst. Mineral. 374 Psilomelanite... Crystalline form has not been observed. Occurs massive and botryoidal... Lustre submetallic. Streak reddish, brownish-black, shining. 1879 Cassell's Techn. Educator (new ed.) IV. 255/1 Psilomelanite and braunite..are hydrated peroxide and sesquioxide of manganese. 1917 Proc. U.S. National Mus. 1916–17 51 81 (title) Notes on alunite, psilomelanite, and titanite. < as lemmas |
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