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Ca
Calcium

History

 Up until the late 18th century lime (, which includes calcium) was considered to be a simple matter. Only in 1789 A. Lavuaze suggested that this difficult matter. In 1808 Humphrey Davy was pure calcium by electrolysis of wet hydrated lime with mercury oxide.

 Nowadays

 The most widespread use of calcium found in the construction sector. Cement have been already used by ancient builders. Now the most widespread use of calcium found in the chemical industry and metallurgy. For example, using calcium provide high purity metals such as thorium, vanadium, zirconium, beryllium, niobium, uranium, tantalum and other refractory metals. The various calcium compounds are used primarily in construction: plaster, marble, cement, lime, arbolit. Calcium used in the metallurgy of copper, nickel, special steel and bronze, they are bound harmful impurities sulfur, phosphorus, excess carbon. For the same purpose, use of calcium alloys with silicon, lithium, sodium, boron, aluminum.

Date ASIA EUROPE USA
26/12/2009 6297.57 6297.57 6297.57
19/12/2009 6297.6 6297.6 6297.6
12/12/2009 6297.96 6297.96 6297.96
05/12/2009 6298.54 6298.54 6298.54
28/11/2009 6386.72 6386.72 6386.72
21/11/2009 6297.77 6297.77 6297.77
14/11/2009 6236.37 6236.37 6236.37
07/11/2009 6334.78 6334.78 6334.78
24/10/2009 6304.03 6304.03 6304.03
17/10/2009 6298.69 6298.69 6298.69
10/10/2009 6299.78 6299.78 6299.78
02/10/2009 6152.65 6152.65 6152.65
25/09/2009 6151.87 6151.87 6151.87
18/09/2009 6159.5 6159.5 6159.5
12/09/2009 6150.27 6150.27 6150.27
05/09/2009 6181.02 6181.02 6181.02
28/08/2009 6147.54 6147.54 6147.54
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