While cerium oxide is a rare Earth element, it is one of the more common ones. Its abundance has been compared to copper.
氧化铈是一种较常见的稀土元素，其储存量可以与铜相媲美。
The sample preparation by the filter paper method and the direct determination of major (thulium)and five neighbouring micro-rare earth element impurities in pure thulium oxide by XRF are described.
本文拟定了一种采用滤纸片法制样，X射线荧光直接测定纯氧化铥中氧化铥主量以及氧化钬、氧化铒、氧化镱、氧化镥和氧化钇等稀土杂质含量的分析方法。
New types 'of ceramic photochromic pigments doped with Er-oxide and other rare--earth or transition element oxides were prepared.
用铒氧化物并添加其它稀土氧化物及过渡金属氧化物合成出了新型陶瓷光致变色颜料。
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