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Bischofite
Bischofite (bischofit) is a hydrous magnesium chloride mineral with formula MgCl2·6H2O. It belongs to halides and is a sea salt concentrate dated from the Permian Period (nearly 200 million years ago). Bischofite is ecologically pure natural magnesium poly-mineral with a unique composition. It contains many macro- and micro-elements vital for human health, in much higher concentrations than can be found in sea or ocean salt. The main bischofit compound is magnesium chloride (up to 350 g/L), moreover, it contains about 70 other elements as impurities, including potassium, sodium, bromine, boron, calcium, silicon, molybdenum, silver, zinc, iron and copper.
==History==
Bischofite is named in honor of German geologist Gustav Bischof (1792–1870). Its discovery (1877) is attributed to Carl-Christian Ochsenius.〔Ochsenius, C. (1877): Die Bildung der Steinsalzlager und ihrer Mutterlaugensalze unter specieller Berücksichtigung der Flöze von Douglashall in der Egeln´schen Mulde. Verlag Pfeffer (Halle), 172 p.〕
At its type locality bischofite it an evaporite formed in an ancient seabed, which was deposited more than 200 million years ago, during the Permian Period.〔
In 1930–1950, vast bischofite deposits were discovered near the Volga River in Russia. The mineral is mined by dissolving an underground dry mineral stratum with artesian water. The resulting brine is pumped out.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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