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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 Tanco Mine ： ウィキペディア英語版 Tanco Mine Tanco Mine is an underground caesium and tantalum mine, owned and operated by Cabot Corporation on the north west shore of Bernic Lake, Manitoba, Canada. The mine has the largest known deposit of pollucite and is also the world's largest producer of caesium. ==History== The pegmatite ore body now mined by the Tanco Mine was discovered in the late 1920s and the first mining started in 1929. Several times the mine was closed, reopened and closed, until in 1969 when it was reopened as a tantalum mine.〔 Cabot Corporation bought the mine in 1993, and began the production of caesium brine from pollucite in 1996.〔(【引用サイトリンク】The Tanco Mine )〕 The caesium brine is converted into caesium formate which is used mostly as additive for drilling fluids to increase the fluid's density. A concentrated solution of caesium formate has a density of 2.3 g/cm3.〔 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「Tanco Mine」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.