RICHARDS AND OENSLAGER. — CUPRIABIMONIUM SALTS. 81 



Copper 

 Ammonia 

 Iodine 

 Acetic acid 



100.00 



100.09 



(2.) OCTOCUPRIAMMONIUM MoNO-IODIDE AcETATE, 



Cu8(NH3)ieI(QH30,)i5. 



On allowing the mother liquor left over from the first method of 

 preparing ammon-cupriamraonium aceto-iodide to stand for a long time, 

 large coal-black hexagonal crystals of unknown composition were de- 

 posited. Mixed with these were large blue crystals, which were sepa- 

 rated mechanically from the black ones, and analyzed. The analysis 

 corresponded closely with the formula 



7 Cu(NH3)2(C2H302)2 4- Cu(NH3)2TC2H302, 



the complexity of which led to the suspicion that the crystals were a 

 mixture instead of a definite compound. Nevertheless, upon qualita- 

 tive testing, the smallest as well as the largest crystals were found to 

 contain iodine. 



In external appearance the crystals, which were usually at least half 

 a centimeter in length, resembled those of cupriammonium acetate. 

 An attempt was made to measure the angles of the crystals of each 



VOL. XXXI. (n. 8. XXIII.) 6 



