作者:J.M. Leger、N. Yacoubi、J. Loriers
DOI:10.1016/0022-4596(81)90436-9
日期:1981.3
parameter consideration it is concluded that these compounds are the rare earth monoxides. For Ln =Gd, Dy, Tm, no reaction is observed at 50 kbar and 1000°C. The rare earth monoxides show a variety of properties: LaO, CeO, PrO, and NdO are metallic with the rare earth in the trivalent state; EuO and YbO are semiconductors with the rare earth in the divalent state; SmO is metallic with samarium in an intermediate
已经计算出从稀土金属和倍半氧化物形成离子或金属一氧化物的标准吉布斯能量变化。在高压下,应获得离子一氧化and和较轻的稀土金属一氧化物,通过带式设备在15–80 kbar和500-1200°C的温度范围内进行的实验证实了这一点。对于Ln= La,Ce,Pr,Nd,Sm,从每个反应获得面心立方化合物。电池参数分别为5.144、5.089、5.031、4.994和4.943±0.005A 3。该化合物呈金黄色,具有金属光泽。从化学分析和细胞参数考虑可以得出结论,这些化合物是稀土一氧化碳。对于Ln= Gd,Dy,Tm,在50kbar和1000℃下未观察到反应。稀土一氧化物具有多种特性:LaO,CeO,PrO和NdO是金属,稀土元素为三价态。EuO和YbO是稀土元素为二价态的半导体。SmO是金属的,sa的中间价态接近3。