8 P. T. Cleve, 



Chloroaurate of didymium 



DiCls + AuCla+lOH^O. 



On slowly evaporating, over oil of vitiol, the mixed solutions of 

 the simple salts, beautiful, large, yellow, rhombic, and very deliquescent 

 tabular crystals are deposited. 



0.7210 gram gave with sulphurous acid and by evaporation 0.4755 

 gram Au + Di2 3S04 which, when treated with water, left 0.19.33 gram 

 Au. The difference is 0.2822 gram DigSSO^. 



In percent: , , 



'■ C a 1 c 



Spec. Grav: 

 0.8854 gram, large crushed crystals, t" 18 sp. Gr. 2.662 

 0.7580 » » » ï> y> » » 2.664 



Mean of both determinations : 2.663. 

 Molecular volume: 274.5. 



Bromoaurate of didymium 



DiBrn + AuBra+lOH^O. 



Large dark-brown or almost black, shining, thick rhombic tablets 

 which are not very deliquescent. 



1.3262 gram was mixed with a solution of sulphurous acid and 

 evaporated. The mixture of Au + Di2 3S04 weighed 0.6469 gram. On 

 dissolving in water 0.2615 gram An remained. The difference, or 

 Di2 3S04, is 0.3854. 



0.6325 gram was reduced with zinc and sulphuric acid. The 

 remaining Au, washed with H2SO4, weighed 0.1241 gram. From the 

 solution 0.7139 gram AgBr was precipitated. 



