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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 Gregoryite ： ウィキペディア英語版 Gregoryite Gregoryite is an anhydrous carbonate mineral that is rich in potassium and sodium〔(【引用サイトリンク】title=Gregoryite definition )〕 with formula: ().〔 It is one of the two main ingredients of natrocarbonatite, found naturally in the lava of Ol Doinyo Lengai volcano, the other being nyerereite. Because of its anhydrous nature, gregoryite reacts quickly with the environment, causing the dark lava to be converted to white substance within hours.〔 Gregoryite was first described in 1980 and named after the British geologist and author John Walter Gregory (1864–1932), who studied the East African Rift Valley.〔〔 It occurs associated with nyerereite, alabandite, halite, sylvite, fluorite and calcite.〔 ==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「Gregoryite」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.