单词 | scheelite |
释义 | Word Frequency scheelite(ˈʃiːlaɪt) noun a white, brownish, or greenish mineral, usually fluorescent, consisting of calcium tungstate in tetragonal crystalline form with some tungsten often replaced by molybdenum: occurs principally in contact metamorphic rocks and quartz veins, and is an important source of tungsten and purified calcium tungstate. Formula: CaWO4 Word origin C19: from German Scheelit, named after Karl Wilhelm Scheele (1742–86), Swedish chemist |
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