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calcium
A metallic element of the alkaline-earth group; never found in nature uncombined, occurs abundantly as limestone (CaCO3), gypsum (CaSO4. 2H2O), and fluorite (CaF2). 473 Symbol, Ca. Used as a reducing agent, deoxidizer, desulfurizer, or decarburizer for alloys; as quicklime (CaO), it is the great cheap base of the chemical industry with countless uses.
- 词性: noun
- 行业/领域: 采矿
- 类别 一般矿业; Mineral mining
- Government Agency: USBM
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创建者
- ed.young
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(Milwaukee, United States)