180 Wheeler and Penfield — Alkaline Iodates. 



Caesium 29*1 1 



Iodine - 50*2 1 



Oxygen 1 8*99 



Chlorine 3*24 



This compound was also obtained by the following methods. 

 By mixing 6 grams of CsI0 3 , 20 cc. of water and 10 cc. of 

 HC1 sp. gr. 1*1. The mixture was boiled, it became yellow 

 and chlorine was evolved. When cooled the substance sepa- 

 rated as a crystalline crust. It was identified by a determina- 

 tion of caesium which gave 28-40 per cent. 



The compounds 2CsI0 3 . I a O B . 2HIO, and CsCl . HI0 3 give 

 this body when their hot saturated solutions are cooled. A 

 caesium determination in the products thus obtained gave 27*94: 

 and 28' 12 per cent respectively. 



When this body is treated with hydrochloric acid, sp. gr. 

 1*1, the solution becomes yellow, evolves chlorine on warming, 

 and when concentrated on the water bath yields on cooling 

 well crystallized CsCl . C1I. Analysis gave 50*63 per cent of 

 caesium chloride, calculated for CsCl . C1I 50*90 per cent. 



When heated in a closed tube it gives no sign of water, 

 gives off iodine then melts with the evolution of iodine and 

 oxygen. The residue consists of caesium iodide. 



2CslO z . d 2 O b . 2HIO r — This body was obtained by adding 

 5 grams of 2CsI0 3 . I 2 5 to a boiling solution of 25 grams of 

 iodine pentoxide in sufficient water to form a syrup. Water 

 was then added and the precipitate thus produced proved to 

 be the compound in question. Thus produced it separates as 

 a finely divided amorphous precipitate which can be dried in 

 the air or at 100° without losing water. It is difficultly solu- 

 ble in water and when crystallized from an aqueous solution 

 gives 2CsI0 3 . I 2 6 . An analysis of the substance dried at 100° 

 gave 



Calculated for 

 Found. 2C 3 I0 3 I 2 6 . 2HI0 3 . 



Caesium, 19-71 20*43 



Iodine, 57*68 58-52 



Oxygen, 20-41 20-89 



Hydrogen, -12 -16 



Water determinations in samples dried in the air on paper 

 gave 1-45 and 1-38 per cent ; theory requires 1*44. 



When the substance is heated it gives off water and iodine, 

 then oxygen, the residue consisting of caesium iodide. 



CsCl . JBI0 3 . — This was obtained in an attempt to increase 

 the yield of 2CsI0 3 . I 2 6 by adding a rather small quantity of 

 caesium carbonate to a hot saturated solution of CsCl . C1 3 I, 

 when on cooling and allowing the mixture to stand, colorless, 



