CRYSTALLOGRAPHICAL RELATIONSHIP 249 



crystallographically by Groth. Fock (7) re-examined the salt, 

 and both Meyer and Fock gave the formula as K 3 InCl 6 1 JH 2 0. 

 The salt is very soluble in water, and forms small, slightly 

 yellowish crystals. From solutions containing potassium 

 chloride and InCl 3 in the proportions 3:1, potassium chloride 

 was precipitated on evaporation at room temperature till 

 very little solution remained. Precipitation of the complex 

 salt then took place in a solution in which the concentration 

 of indium ions was very high. The crystals were either 

 tabular on jOOlj (Fig. 4), or elongated along the C axis, and 



K 3 InCl 2H a O 

 FIG. 4 



showed large faces of jlllj. On only one of all the crystals 

 examined did the form jlOlj appear, and in that case it was 

 very poorly developed. The faces of jlOOj were more pro- 

 nounced than those of \110\, and the reflections were very 

 good. 



System : Ditetragonal bipyramidal. 



Axial constants : a : c=l : -8173. 



Forms present: JlOOj, jllOj, J001|, \lll\, jlOlj on one crystal. 

 S. G.= 2-483 at 20. 



2 i 



