36 



PROCEEDINGS OF THE Al^rERICAN ACADEMY 



Octamin salt, |Co,,A,Xj |Co,A,Xj = 2. CoaAgXg 



Xanthocobalt salt, \ Co^AmX,'^ \ Co.A.Xg^ 2 = ^- Co,.A,Xg 



Luteosalt«, iCo,A,2nCo.,X,J = 2. Co^AgX^ 



Luteosaltp, jCo^Ajj JCo^aX^s = 4. Co^A.Xe 

 Erdmann's salt. 



1. Co^AeXg 



The salts of luteocobalt, the formulas of which may be considered as 

 well established, are as follows : — 



Chloride, 



Iodide, 



Bromide, 



Nitrate, 



Sulphate, 



Chromate, 



Difhromate, 



Oxalate, 



Carbonate, 



Acid carbonate. 



Phosphate (Braun), 



Pyrophosphate, 



Cobalto-nitrite (Sad tier, 



Gibbs), 

 Ammonia-cobalt-nitrite, 

 Sulphato-chloride (Krok), 

 Sulphato-iodide (Krok), 

 Chromo-chloride (Braun), 

 Cobalticyanide,* 

 Ferricyanide,* 

 Chromicyanide (Braun), 

 Platino-cliloride, 

 Auro-chloride, 

 Stannoso-chloride (Braun), 

 II} drargo-chloride (Krok), 

 Ilydrargo-chloride (Carstau- 



j«'i'). 

 Sulphato-hydrargo-chloride 

 (Krok). 



Co,(NH3),2Cl, 



Co,(NH3),,T, 



Co,(NH3),2Br, 



Co,(NH3),,(NO,), 



Co,(NH3),,(SO,)3+50H, 



Co,(xNH3),,(CrOj3+50H2 



Co.,(NH3)i,(Cr.,0,)3+50H2 



Co;(NH3),2rC,Oj3+40H, 



Co,(NH3),,(C03)3+70H, 



Co,(NH3)i,(CO.,)3+CHA+50H2 



Co.,(NH3),2(POJ,+80H2 



Co,(NH3),,.PA.+60H2 



Co.,(NH3)i,.Co.,(NO.,)i, 



Co.,(NH3),4Co.,(NH3),(N02)sJ8 

 Co.,(NH3)j„(SO,),Cl+60H2 



Co,(NH3)j2(SO,)J,, 



Co„(NH3)i„(CrOJ..a4-10OH2 



Co.,(NH3)j2Cy,+Co.,Cy6 



Co,(NH3),2Cy„+Fe,Cy6 

 Co.(NH3),„Cy,+CrX'y« 



Co, ( N H3) ,2Cl„-f 3PtCl,-f 60 H2 



Co2(NH3)J,Cl^-i-2AuCl3 



Co.XNH,)„'ci,-j-3SnCl.,+80H, 



Co";(NH3);,Cl,+2HgCl+30H2 



Co2(NH3),2Cl,+4HgC]2+OH2 



Co,(NH3),2(SOj2Cl2+2IIgCl2 



* The analyses of tlie cohalticyanide and ferricyanide made by Gentli and 

 mj'self correspond belter with a formula containing one atom of water of crys- 

 tallization. 



