in sulfuric acid decanted, maintained at 90°C for 2 h, cooled to 0°C at 5°C/h, kept there for 22 h; filtrn., washed with distilled water, dried at temp. < 30°C;
参考文献
Nakamura; Yoshimura; Nakatani; Miyake
Journal of Alloys and Compounds, 1993 , vol. 192, # 1-2 p. 303 - 305
in water rapid addn. (stirring) of oxalic acid soln. to neutral soln. of rare earth nitrate (95°C), pptn.; ppt. filtartion, washing, drying to const. weight over satd. NH4Cl at 25°C; thermal anal., differential thermal anal., powder X-ray diffraction;
参考文献
Fuller; Pinkstone
Journal of the less-common metals, 1980 , vol. 70, # 2 p. 127 - 142
in water weighing of Nd2O3; dissolving in HCl; fast addn. of fresh prepared oxalic acid soln. in large excess; pptn., filtration, washing with H2O; drying in air at 80°C for 24h;
参考文献
Ubaldini; Artini; Costa; Carnasciali; Masini
Journal of Thermal Analysis and Calorimetry, 2008 , vol. 91, # 3 p. 797 - 803
