5h in vac. at 1300-1340 °C; Metal distilles off. Repeated distn. gives 99.5percent purity;
参考文献
Guntz, A.; Benoit, F.
Bulletin de la Societe Chimique de France, 1924 , vol. 35, p. 712 - 712
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Gmelin Handbook: Ba: MVol., 2.1, page 32 - 37
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Guntz, A.
Chim. Ind. Sondernummer 1929 461 C{461}
Ti or Zr or Hf or Th; oxides of La or of Ce or of Th in neat (no solvent) reduction of BaO2 with Ti or Zr or Hf or Th dild. with oxides of La or of Ce or of Th;;
BaCl2 in neat (no solvent) Electrolysis; satn. of molten BaCl2-LiCl- or BaCl2-NaCl-mixtures with BaCO3, electrolysis for 1.5h (3-4 V, 10 A, carbon electrodes) forms Ba and CO;;
参考文献
Annales de Chimie (Cachan, France), , vol. 1, p. 446 - 525
