998 



Au + Di2 3S04 . 48.78 — — 48.30 



Spec. Grav. 



1.3292 gram, large crushed crystals, temp. 21''.2 sp. Gr. 3.297 

 1.4832 » » » » » » » » 3.311 



Mean of both determinations: 3.304. 

 Molecular volume: 302.1. 



Chloroplatinate of didymium 



DiCl3 + PtCl4+]0'/2H,O. 



This double salt crystallises from a very concentrated solution in 

 deliquescent, orange coloured, four-sided prisms. 



0.4653 gram was heated with, oxalate of ammonia and gave 0.2177 

 gram DiaOg + Pt. After treating with sulphuric acid 0.2907 gram 

 Di2 3S04 + Pt was obtained. 0.1176 gram Pt being left after extraction 

 with water, the mixtures contained therefore O.lOOl gram DigOg and 

 0.1731 gram Di2 3S04. 



In percent: ^ , 



"• Calc 



Di 18.40 18.47 142.0 18 33 



Pt 25.27 195.0 25.18 



CI . — 248.5 — 



H.O — 189.0 — 



774.5 

 Di^Os + Pt .... 46.79 — 46.61 



DiaSSO^ + Pt . . . 62.48 — 62.10 



Nova Acta Reg. Soo. Sc. Ups. Ser. III. 2 



