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| Section2 = | Section3 = | Section4 = }} Promethium(III) oxide is a compound with the formula Pm2O3. It is the most common form of promethium. == Crystal structure == Promethium oxide exists in three major crystalline forms: *a, b and c are lattice parameters, Z is the number of formula units per unit cell, density is calculated from X-ray data. The low-temperature cubic form converts to the monoclinic structure upon heating to 750–800 °C, and this transition can only be reversed by melting the oxide. The transition from the monoclinic to hexagonal form occurs at 1740 °C. 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「Promethium(III) oxide」の詳細全文を読む スポンサード リンク
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