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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 Tungsten(IV) oxide ： ウィキペディア英語版 Tungsten(IV) oxide |Section2= |Section3= |Section7= |Section8= }} Tungsten dioxide is the chemical compound with the formula WO2. The bronze-colored solid crystallizes in a monoclinic cell.〔 〕 The rutile-like structure features distorted octahedral WO6 centers with alternate short W–W bonds (248 pm).〔 Each tungsten center has the d2 configuration, which gives the material a high electrical conductivity. WO2 is prepared by reduction of WO3 with tungsten powder over the course of 40 hours at 900 °C. An intermediate in this reaction is the partially reduced, mixed valence species W18O49. :2 WO3 + W → 3 WO2 The molybdenum analogue MoO2 is prepared similarly. Single crystals are obtained by chemical transport technique using iodine. Iodine transports the WO2 in the form of the volatile species WO2I2. ==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「Tungsten(IV) oxide」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.