in hydrogen bromide aq. HBr; dissolving of La-oxide in concd. HBr, addn. of bromide; evapn., heating up to 570°C (vac.), then up to 650°C, melting (1100 K), distn. (0.1 Pa, 1150 K);
参考文献
Rycerz; Gaune-Escard
Journal of Thermal Analysis and Calorimetry, 1999 , vol. 56, # 1 p. 355 - 363
in hydrogen fluoride byproducts: AsF5; HF (liquid); absence of air and moisture, poly(fluorinated hydrocarbon) apparatus; repeated treatment with fresh HF (1 equiv.) and evapn. (vac.);
参考文献
Shen, Ciping; Zemva, Boris; Lucier, George M.; Graudejus, Oliver; Allman, John A.; Bartlett, Neil
Inorganic Chemistry, 1999 , vol. 38, # 20 p. 4570 - 4577
