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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 Limonite ： ウィキペディア英語版 Limonite Limonite is an iron ore consisting of a mixture of hydrated iron(III) oxide-hydroxides in varying composition. The generic formula is frequently written as FeO(OH)·nH2O, although this is not entirely accurate as the ratio of oxide to hydroxide can vary quite widely. Limonite is one of the two principal iron ores, the other being hematite, and has been mined for the production of iron since at least 2500 BCE.〔MacEachern, Scott (1996) ("Iron Age beginnings north of the Mandara Mountains, Cameroon and Nigeria" ) pp. 489–496 ''In'' Pwiti, Gilbert and Soper, Robert (editors) (1996) ''Aspects of African Archaeology: Proceedings of the Tenth Pan-African Congress'' University of Zimbabwe Press, Harare, Zimbabwe, ISBN 978-0-908307-55-5; archived (here ) by Internet Archive on 11 March 2012〕〔Diop-Maes, Louise Marie (1996) ("La question de l'Âge du fer en Afrique" ("The question of the Iron Age in Africa") ) ''Ankh'' 4/5: pp. 278–303, in French; archived (here ) by Internet Archive on 25 January 2008〕 ==Names== Limonite is named from the Greek word for meadow (λειμών), in allusion to its occurrence as bog iron ore in meadows and marshes. In its brown form it is sometimes called brown hematite or brown iron ore. In its bright yellow form it is sometimes called lemon rock or yellow iron ore. 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「Limonite」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.