单词 | ludwigite |
释义 | ludwigiten. Mineralogy. A black fibrous borate of magnesium and iron. ΚΠ 1875 J. D. Dana Min. App. ii. 35 Ludwigite occurs altered to limonite. 1887 Mineral. Mag. 7 43 A. Renard..examines the optical properties of Ludwigite. This entry has not yet been fully updated (first published 1903; most recently modified version published online June 2019). < |
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