单词 | cordierite |
释义 | Word Frequency cordierite(ˈkɔːdɪəˌraɪt) noun a grey or violet-blue dichroic mineral that consists of magnesium aluminium iron silicate in orthorhombic crystalline form and is found in metamorphic rocks. Formula: (Mg,Fe)2AL4 Si5O18.nH2O Also called: dichroite, ioliteWord origin C19: named after Pierre L. A. Cordier (1777–1861), French geologist who described it |
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