Guntz and Roederer (Comptes rendus, 1906, 142, p. 400) by heating the hydride in a vacuum to 1000.
The hydride, SrH 2, was obtained by Guntz on heating strontium amalgam in a current of hydrogen.
Guntz, Comptes rendus, 1901, 133, p. 1209).
Guntz and H.
Guntz (Comptes rendus, 1901, 133, p. 872) electrolyses a saturated solution of barium chloride using a mercury cathode and obtains a 3% barium amalgam; this amalgam is transferred to an iron boat in a wide porcelain tube and the tube slowly heated electrically, a good yield of pure barium being obtained at about looo C. The metal when freshly cut possesses a silver white lustre, is a little harder than lead, and is extremely easily oxidized on exposure; it is soluble in liquid ammonia, and readily attacks both water and alcohol.
Three oxides of barium are known, namely, the monoxide, BaO, the dioxide, Ba02, and a suboxide, obtained by heating Ba0 with magnesium in a vacuum to 110o (Guntz, loc. cit., 1906, p. 359).
Guntz, Comptes rendus, 1896, 122, p. 2 44; 12 3, p. 1273) is a white solid which inflames when heated in chlorine.