摘要
In our previous studies, two intermediate compounds, La2O2·2BeO and 3La2O3·2BeO, were identified in the system La2O3-BeO and one compound, Sm2O2. 2BeO in the system Sm2O<sup>3-BeO, and from gadolinum oxide and onwards, only metastable compounds were found to exist in their systems with beryllium oxide. Since neodymium has a position between lanthanum and samarium in the periodic table, a study of