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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 ekanite ： ウィキペディア英語版 ekanite Ekanite is an uncommon mineral notable primarily as being among the very few gemstones that are naturally radioactive. Most ekanite is mined in Sri Lanka, although deposits also occur in Russia and North America. Clear and well-colored stones command the best prices, but such stones are rare; the mineral's radioactivity tends to degrade the crystal matrix over time in a process known as metamictization. Ekanite was first described in 1955 by F. L. D. Ekanayake,〔(New Minerals, American Mineralogist )〕 and it is named after him.〔(New Minerals, American Mineralogist )〕 ==References== 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「ekanite」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.