翻訳と辞書 Words near each other ・ Tetradium daniellii ・ Tetradium ruticarpum ・ Tetradonematidae ・ Tetradoxa ・ Tetradrachm ・ Tetradymia ・ Tetradymia argyraea ・ Tetradymia axillaris ・ Tetradymia canescens ・ Tetradymia comosa ・ Tetradymia glabrata ・ Tetradymia nuttallii ・ Tetradymia spinosa ・ Tetradymia stenolepis ・ Tetradymia tetrameres ・ Tetradymite ・ Tetraedoron ・ Tetraedron ・ Tetraethyl dithiopyrophosphate ・ Tetraethyl orthosilicate ・ Tetraethyl pyrophosphate ・ Tetraethylammonium ・ Tetraethylammonium bromide ・ Tetraethylammonium chloride ・ Tetraethylammonium iodide ・ Tetraethylene glycol dimethyl ether ・ Tetraethylgermanium ・ Tetraethyllead ・ Tetraethylmethane ・ Tetraethyltin 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 Tetradymite ： ウィキペディア英語版 Tetradymite Tetradymite is a mineral consisting of bismuth, tellurium and sulfide, Bi2Te2S, also known as telluric bismuth. If sulfur is absent the mineral is tellurobismuthite and the formula is then Bi2Te3. Traces of selenium are usually present. Crystals are rhombohedral, but are rarely distinctly developed; they are twinned together in groups of four; hence the name of the mineral, from the Greek for fourfold. There is a perfect cleavage parallel to the basal plane and the mineral usually occurs in foliated masses of irregular outline. The color is steel-grey, and the lustre metallic and brilliant. The mineral is very soft (H = 1.5 - 2) and marks paper. The specific gravity is 7.2 to 7.9. The type locality is Zupkov (Zsubko; Schubkau), Stredoslovenský Kraj, Slovak Republic where it was reported in 1831.〔 It was first found, in 1815, at Telemark in Norway. It often occurs in high temperature hydrothermal quartz veins associated with native gold and in contact metamorphic deposits.〔 ==References== ;Attribution * 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「Tetradymite」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.