第三章 稀土的金属热还原

656±5Р3338?3450?3257?3212?3217?2460?1778?1597?3233?3041?2335?2720?2510?1727?1193?3315Р4.469?6.145,5.95(903℃)?6.657?6.73(α),6.64(β)?7.007?—?7.52(α),7.4(β)?5.243?7.9004?8.229?8.550?8.795?9.066?9.321?6.965(α),6.54(β)?9.840Р稀土氧化物及常用还原剂氧化物的热力学性质Р化合物Р熔点,℃Р标准生成焓?-△H298θ,KJ/molР1527℃的标准生成自由能?△FTθ,KJ/molРSc2O3?Y2O3?La2O3?Ce2O3?Pr2O3?Nd2O3?Sm2O3?Eu2O3?Gd2O3?Tb2O3?Dy2O3?Ho2O3?Er2O3?Tm2O3?Yb2O3?Lu2O3?CaO?Al2O3?MgOР2217?2393?2127?2211?2262?2002?2322?2292?2352?2367?2387?2392?2372?2467?2572?2050?2800Р1906.1?1903.8?1792.0?1087.6?1821.6?1807.3?1813.7?1639.8?1813.9?1862.6?1867.6?1878.9?1896.0?1886.8?1812.8?1876.4?1268.2?1096.0?601.1Р1384.6?1391.6?1367.1(1227℃)?788.2(1673℃)?1427.5(1127℃)?1375.9(1227℃)?1376.9(1227℃)?1218.1(1127℃)?1309.2?1359.8?1348.5?1366.0?1379.8?1376.9?1444.6(1027℃)?1358.1?441.8?661.3?360.7