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出典:Wiktionary
tetradymite (複数形 tetradymites)
出典:Wikipedia
出典:『Wikipedia』 (2011/06/14 12:15 UTC 版)
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.
Tetradymite