单词 ludwigite 释义 ludwigite Min.|ludvgat|[Named by Tschermak, 1874, after Prof. E. Ludwig: see -ite.]A black fibrous borate of magnesium and iron.1875Dana Min. App. ii. 35 Ludwigite occurs altered to limonite.1887Mineral. Mag. VII. 43 A. Renard..examin...