单词 | gypsum |
释义 | gypsum [`jip·sǝm] MINERALOGY CaSO4⋅2H2O A mineral, the commonest sulfate mineral; crystals are monoclinic, clear, white to gray, yellowish, or brownish in color, with well-developed cleavages; luster is subvitreous to pearly, hardness is 2 on Mohs scale, and specific gravity is 2.3; it is calcined at 190-200°C to produce plaster of paris. |
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