翻訳と辞書 Words near each other ・ Eucinostomus ・ Eucinostomus argenteus ・ EUCIP ・ Eucirroedia ・ Eucirroedia pampina ・ Eucithara ・ Eucithara coronata ・ Eucla Basin ・ Eucla cod ・ Eucla Land Division ・ Eucla National Park ・ Eucla, Western Australia ・ Eucladoceros ・ Eucladodes ・ Euclarkia ・ Euclase ・ Euclase Stakes ・ Euclasta ・ Euclasta (moth) ・ Euclasta (plant) ・ Euclasta amseli ・ Euclasta bacescui ・ Euclasta defamatalis ・ Euclasta filigeralis ・ Euclasta gigantalis ・ Euclasta insularis ・ Euclasta maceratalis ・ Euclasta mirabilis ・ Euclasta montalbani ・ Euclasta pauli 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 Euclase ： ウィキペディア英語版 Euclase Euclase is a beryllium aluminium hydroxide silicate mineral (BeAlSiO4(OH)). It crystallizes in the monoclinic crystal system and is typically massive to fibrous as well as in slender prismatic crystals. It is related to beryl (Be3Al2Si6O18) and other beryllium minerals. It is a product of the decomposition of beryl in pegmatites.〔 Euclase crystals are noted for their blue color, ranging from very pale to dark blue. The mineral may also be colorless, white, or light green. Cleavage is perfect, parallel to the clinopinacoid, and this suggested to René Just Haüy the name euclase, from the Greek , easily, and , fracture. The ready cleavage renders the crystals fragile with a tendency to chip, and thus detracts from its use for personal ornament. When cut it resembles certain kinds of beryl and topaz, from which it may be distinguished by its specific gravity (3.1). Its hardness (7.5) is similar to beryl (7.5 - 8), and a bit less than that of topaz (8). It was first reported in 1792 from the Orenburg district in the southern Urals, Russia, where it is found with topaz and chrysoberyl in the gold-bearing gravels of the Sanarka (nowadays probably, Sakmara River, Mednogorsk district, Orenburgskaya Oblast'). Its type locality is Ouro Prêto, Minas Gerais, Southeast Region, Brazil,〔 where it occurs with topaz. It is found rarely in the mica-schist of the Rauris in the Austrian Alps. ==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「Euclase」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.