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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 Madocite ： ウィキペディア英語版 Madocite Madocite is a mineral with a general formula of Pb17(Sb,As)16S41. Madocite was named for the locality of discovery, Madoc, Ontario, Canada. It is found in the marbles of the Precambrian Grenville Limestone.〔 It is orthorhombic (rectangular prism with a rectangular base) and in the point group ''mm2''. Its crystals are elongated and striated along () to a size of 1.5 mm. Madocite is anisotropic and classified as having high relief. It also displays strong pleochroism.〔 Madocite is found in small clusters in marble pits (near Madoc, Ontario), and was originally categorized in the 1920s as an unidentified sulfosalt mineral in an assemblage of pyrite, sphalerite, and jamesonite in marble. Later research was done by John L. Jambor in the 1960s who went to the site and collected samples of the assemblages.〔(History of discovery )〕 ==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「Madocite」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.