326 Report of the Department of Chemistry of the 



Another portion of the substance was recrystallized as follows: 

 2 grams were dissolved in a small amount of the dilute hydrochloric 

 acid, barium hydroxide added, with constant shaking, until a faint 

 permanent precipitate remained, and the solution filtered. The 

 filtrate was then heated to boiling and allowed to stand for a few 

 minutes. As the temperature rose the solution began to turn 

 cloudy and finally a heavy precipitate separated which appeared 

 to be amorphous at first but it soon changed into the same crystal 

 form as previously described. This was filtered and washed free 

 of chlorides in boiling water and then in alcohol and ether and 

 allowed to dry in the air. The dry substance weighed 1.6 grams. 

 The snow-white crystalline powder was free from inorganic phosphate. 

 It was analyzed after drying at 105° in vacuum over phosphorus 

 pentoxide. 



0.4695 gram subst. lost 0.0443 gram H 2 0. 



0.4252 gram subst. gave 0.0423 gram H 2 and 0.0981 gram C0 2 . 

 0.1238 gram subst. gave 0.0885 gram BaS0 4 and 0.0735 gram 

 Mg 2 P 2 7 . 



Found: C = 6.29; H = l.ll; P = 16.54; Ba = 42.06; H 2 = 

 9.43 per ct. 



For heptabarium inosite hexaphosphate (CeHnO^Pe^Ba? = 2267. 

 Calculated: C = 6.35; H=0.97; P = 16.40; Ba = 42.39 per ct. 

 For 14 H 2 calculated, 10.00 per ct. 



Still another portion of the substance was recrystallized in the 

 following manner: 2 grams were dissolved in the dilute hydro- 

 chloric acid and then nearly neutralized with barium hydroxide 

 as before. The solution was filtered and 10 c.c. N /i barium chloride 

 added and allowed to stand over night. The substance had then 

 separated as a heavy crystalline powder of the same form as before 

 except that the individual crystals were much larger. The crystals 

 were filtered, washed free of chlorides with water and finally in 

 alcohol and ether and allowed to dry in the air. It was analyzed 

 after drying as above. 



0.6430 gram subst. lost 0.0745 gram H 2 0. 



0.5685 gram subst. gave 0.0603 gram H 2 and 0.1258 gram C0 2 . 

 0.2208 gram subst. gave 0.1608 gram BaS0 4 and 0.1252 gram 

 Mg 2 P 2 07. 



Found: C = 6.03; H = 1.18; P = 15.80; Ba = 42.85; H 2 = 

 11.58 per ct. 



For heptabarium inosite hexaphosphate (C 6 Hii0 24 P6) 2 Ba7 = 2267. 



Calculated: C = 6.35; H = 0.97; P = 16.40; Ba = 42.39 per ct. 

 For 16 H 2 calculated: 11.27 per ct. 



