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 1H 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 a 2H 2 

 FIG. 4 



showed large faces of jlll(. On only one of all the crystals 

 examined did the form |101j appear, and in that case it was 

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

 nounced than those of |110j, and the reflections were very 

 good. 



System : Ditetragonal bipyramidal. 



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



Forms present: |100j, jllOj, JOOlj, Jill), |101j on one crystal. 

 S. G.- 2-483 at 20. 



2i 



