Triple Chlorides Containing Silver and Gold. 481 



of the yellow salt, while in the second one, with 10%, 

 the result gives lower cesium and higher gold than the 

 analysis, as would be expected from actual mixtures, 

 slightly contaminated. 



Similar calculations, based upon three constituents, give 

 very satisfactory agreements with the rest of the 

 analyses made by Bayer, so that it seems to be absolutely 

 certain that his preparations were mixtures of the three 

 things. 



The very consistent results that have been obtained 

 here from calculations with Dr. Bayer's analyses show 

 that the latter were undoubtedly very accurate ones, 

 and that he deserves much credit for his analytical skill 

 and reliability. His failure to get a pure triple salt 

 with cesium may be attributed to the fact that the red 

 double salt had not been described at the time that he 

 made the investigation. 



Dr. Bayer's conclusion that his results indicated the 

 existence of a variable triple salt in which 3AgCl and 

 AuCl 3 mutually replaced each other in their combination 

 with CsCl, was hardly in accord with prevailing chemical 

 views, but it was very astonishing and important if true. 

 His application of the same idea to the rubidium triple 

 chloride which had given him analyses satisfactorily 

 agreeing with a definite, constant formula appears to 

 have been entirely unwarranted. 



Immediately following Bayer's paper, Professor Enrich 

 published 8 an interesting theoretical discussion in favor 

 of the supposed variable triple chlorides, but he presented 

 no new facts in regard to them. 



Somewhat later, E. Suschnig gave 9 an account of an 

 investigation on the triple bromide of rubidium, silver 

 and gold and the corresponding cesium compound. 

 From four analyses of each of the salts he came to the 

 conclusion that they were variable, and that they cor- 

 responded to Bayer's formula (certainly uncorrect) for 

 the chlorides. From analogy it seems safe to say that 

 Suschnig also analyzed mixtures, but since these 

 bromides have not been investigated by any one else, it 

 is impossible to decide what the mixtures were. 



8 Monatsh. f. Chem., 41, 249, 1920. 

 9 Monatsh. f . Chem., 42, 399, 1921. 



