单词 | kaolin |
释义 | kaolin [`kā·ǝ·lǝn] MINERALOGY Any of a group of clay minerals, including kaolinite, nacrite, dickite, and anauxite, with a two-layer crystal in which silicon-oxygen and aluminum-hydroxyl sheets alternate; approximate composition is Al2O3⋅2SiO2⋅2H2O. PETROLOGY A soft, nonplastic white rock composed principally of kaolin minerals. Also known as bolus alba; white clay. |
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