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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Ellsworthite ： ウィキペディア英語版 Ellsworthite Ellsworthite (Ca,U)2(Ti,Nb,Ta)2O6(OH) is a rare earth mineral mostly found in the northern parts of North America. It is named after H. V. Ellsworth of the Canadian Geological Survey by Walker and Parsons. Ellsworthite is also known under the name . It is a very and rich mineral, which in fact makes it slightly radioactive. makes up about 17.1% of the mineral.〔Frondel, J.W., Fleischer, M. (1950) A Glossary of Uranium-and Thorium-Bearing minerals. Geological Survey Circular 74, pg.11, http://babel.hathitrust.org/cgi/pt?id=uc1.32106020887797;view=1up;seq=1〕 ==Introduction== Ellsworthite is part of pyrochlore super group and the sub group betafite and was named after the Canadian Mineralogist and surveyor H. V. Ellsworth. Ellsworthite is also known as the mineral Betafite. Ellsworthite is a - bearing mineral that is found mostly in Canada and Alaska. It was first discovered in Hybla, Ontario, which is now a ghost town.〔 Minerals of the pyrochlore group present one of the most important modes of occurrence of trace elements (Nb,Ta) and were found in various geological (geochemical) environments. It is very important geochemically that the pyrochlore structure is very suitable for diverse isomorphic substitutions.〔Yaroshevski, A.A., Bagdasarev, Yu.A. (2007). Geothermal Diversity Of Minerals of the Pyrochlore Group.〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ellsworthite」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.