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石灰石
释义
石灰石
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工学
钙化合物
释
calcium carbonate
石灰石
主要成分碳酸钙(CaCO3),理论上由氧化钙(CaO,56.04%)和二氧化碳(CO2,43.96%)组成。一般为浅灰、深灰色,含杂质多时颜色发生变化,密度为2.93克/厘米3,熔点为825℃,性脆、硬度小、无臭、无味。露置空气中无反应,不溶于水、醇,但在含有铵盐或三氧化二铁的水中溶解。在800℃以下的范围内,微晶体石灰石的平均热膨胀系数为(4.5~5.0)×10-6/℃,而粗晶体则增加到10.1×10-6/℃。加热到1000~1200℃时即分解成氧化钙和二氧化碳。
Chemistry
>无机化学>无机化学基本概念与无机化合物>释义
limestone
石灰石
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