|
|Section2= |Section3= |Section7= |Section8= }} Antimony tetroxide is an inorganic compound with the formula Sb2O4. This material, which exists as the mineral cervantite,〔(【引用サイトリンク】 Cervantite )〕 is white but reversibly yellows upon heating. The material, with empirical formula SbO2, is called antimony tetroxide to signify the presence of two kinds of Sb centers. ==Formation and structure== The material forms when Sb2O3 is heated in air:〔Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.〕 :Sb2O3 + 0.5 O2 → Sb2O4 ΔH = −187 kJ/mol At 800 °C, antimony(V) oxide loses oxygen to give the same material: :Sb2O5 → Sb2O4 + 0.5 O2 ΔH = −64 kJ/mol The material is mixed valence, containing both Sb(V) and Sb(III) centers. Two polymorphs are known, one orthorhombic (shown in the infobox) and one monoclinic. Both forms feature octahedral Sb(V) centers arranged in sheets with distorted Sb(III) centers bound to four oxides. 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「antimony tetroxide」の詳細全文を読む スポンサード リンク
|