翻訳と辞書 Words near each other ・ Oligospermia ・ Oligostachyum ・ Oligostigma ・ Oligostigma chrysota ・ Oligostigma ducale ・ Oligostigma ectogonalis ・ Oligostigma flavialbalis ・ Oligostigma flavimarginale ・ Oligostigma flavipictalis ・ Oligostigma juncealis ・ Oligostigma metazonalis ・ Oligostigma odrianale ・ Oligostigma phoedralis ・ Oligochlora ・ Oligochroides nigritella ・ Oligoclase ・ Oligoclonal band ・ Oligocottus ・ Oligocrystalline material ・ Oligoda ・ Oligodactyly ・ Oligodendrocyte ・ Oligodendrocyte progenitor cell ・ Oligodendroglioma ・ Oligodiodon ・ Oligodon ・ Oligodon albocinctus ・ Oligodon ancorus ・ Oligodon brevicauda ・ Oligodon calamarius Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Oligoclase ： ウィキペディア英語版 Oligoclase Oligoclase is a rock-forming mineral belonging to the plagioclase feldspars. In chemical composition and in its crystallographic and physical characters it is intermediate between albite (NaAlSi3O8) and anorthite (CaAl2Si2O8). The albite:anorthite molar ratio ranges from 90:10 to 70:30. Oligoclase is a high sodium feldspar crystallizing in the triclinic system. The Mohs hardness is 6 to 6.5 and the specific gravity is 2.64 to 2.66. The refractive indices are: nα=1.533–1.543, nβ=1.537–1.548, and nγ=1.542–1.552. In color it is usually white, with shades of grey, green, or red. ==Name and discovery== The name oligoclase was given by August Breithaupt in 1826 from the Greek ''oligos'', little, and ''clasein'', to break, because the mineral was thought to have a less perfect cleavage than albite. It had previously been recognized as a distinct species by J. J. Berzelius in 1824, and was named by him soda-spodumene (Natron-spodumen), because of its resemblance in appearance to spodumene. 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「Oligoclase」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.