Magnesium is a mineral whose main component is Mg. Magnesium is found in over 60 types of minerals, but only four types are used industrially: dolomite (Ca,Mg)CO 3 , magnesite MgCO 3 , brucite Mg(OH) 2 , and olivine (Mg,Fe) 2 SiO 4 . However, the main source of magnesium metal and compounds is salt water such as seawater and salt lakes. The world's production of the metal in 1996, excluding secondary recovery, was about 340,000 tons, with the major countries being the United States (130,000 tons), Canada (50,000 tons), and China (50,000 tons). Source: Heibonsha World Encyclopedia, 2nd Edition Information |
マグネシウムMgを主要成分とする鉱物。マグネシウムは60種以上の鉱物に含まれているが,ドロマイト(Ca,Mg)CO3,マグネサイトMgCO3,ブルーサイトMg(OH)2,カンラン石(Mg,Fe)2SiO4の4種のみが工業的に利用されている。しかし,マグネシウム金属や化合物の主要な資源は海水と鹹湖などの塩水である。二次回収を除いた金属の1996年の生産量は世界で約34万tで,主要国はアメリカ13万,カナダ5万,中国5万tである。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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