Amalgams europium

Europium (II) acetate, formation of, from europium amalgam, 2 68 Europium(III) acetate, 2 66 citrate solution of, 2 67 Europium amalgams, 2 65, 66, 68n. Europium (II) carbonate, 2 69, 71 Europium(II) chloride, 2 69, 71 formation of, from europium amalgam, 2 68 Europium (III) oxalate, 2 66 Europium (III) oxide, 2 66 Europium (II) salts, 2 69 Europium(II) sulfate, 2 69, 70... 

Eu203 Europium (III) oxide, 2 66 Eu3Hg2 Europium amalgam, 2 68 n. 

HfCli Hafnium chloride, 4 121 HgF Mercury (I) fluoride, 4 136 HgFs Mercury(II) fluoride, 4 136 HgS Mercury(II) sulfide, 1 19 Hg2Eu2 Europium amalgam, 2 68n. 

More evidence for the participation of the reductant in the catalytic process is the dependence of the rate on the redox potential of the reductant. The reduction rate for the europium amalgam (redox potential -1.4 V compared with -1.84 V for sodium amalgam) is approximately two orders of magnitude smaller than for... 

HgS Mercury (II) sulfide, 1 19 [Hg(SCN2H4)Cl]Cl Mercury (II) chloride monothiourea, 6 26 [Hg(SCN2H4)2]Cl2 Mercury(II) chloride dithiourea, 6 27 [Hg(SCN2H4)3]Cl2 Mercury (II) chloride trithiourea, 6 28 [Hg(SCN2H4)4]Cl2 Mercury(II) chloride tetrathiourea, 6 28 Hg2Eus Europium amalgam,... 

Barium dithionate, synthesis SOB Europium amalgam, synthesis 18... 

Europium amalgam is very easily prepared by this method. Simultaneously, some potassium amalgam is formed. After the electrolysis, the latter may be removed nearly completely by action of water, which scarcely attacks europium amalgam as long as any potassium amalgam remains. Ytterbium and samarium are the only other rare earth metals that yield amalgams by the electrolysis of their acetate-citrate solutions. The electrical efficiency is high for europium, considerably less for ytterbium, and small for samarium. 

When potassium amalgam is stirred with europium acetate-citrate solution for 30 to 60 minutes, europium amalgam is formed. 

Distillation of solid or liquid europium amalgam in a high vacuum produces a second solid alloy, Hg Eus, which is fairly stable at red heat. Further heating of this alloy does not readily yield metallic europium since the latter is volatile in a high vacuum at the temperature at which the alloy is decomposed. 

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