A general term for minerals whose main component is tungsten. Examples include wolframite (FeWO 4 ) , wolframite (MnWO 4 ) , and solid solutions of these two minerals (Fe,Mn)WO 4 , scheelite (CaWO 4 ) , and wolframite (PbWO 4 ) . There are also tungstate minerals containing Cu, Bi, Fe, etc., and tungsten oxide ore (WO 3 ・H 2 O), but most are weathering products and are not important resources. They exist in the earth's crust at an average concentration of about 1 ppm. Of these minerals, wolframite and scheelite are important resources. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
タングステンを主成分とする鉱物の総称。鉄重石FeWO4,マンガン重石MnWO4,この両者の固溶体である鉄マンガン重石(Fe,Mn)WO4,灰重石CaWO4,鉛重石PbWO4などがある。さらにCu,Bi,Feなどを含むタングステン酸塩鉱物や酸化タングステン鉱WO3・H2Oなどもあるが,多くは風化生成物であり,資源としては重要ではない。地殻中には平均1ppm程度存在する。これら鉱物の中で,鉄マンガン重石と灰重石が資源として重要である。
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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