CRYSTALLOGRAPHICAL RELATIONSHIP 257 



and small faces of J011| (Fig. 8). From solutions, however, 

 where the relative proportions of the metallic ions were those 

 represented by (NH 4 ) 2 InCl 5 H 2 O, the crystals always showed 

 large faces of |100|. Such crystals were either developed along 



(NH 4 ) 2 InCl 5 H 2 0(a) 

 FIG. 8 



(NH 4 )jInCl B H S (6) 

 PIG. 9 



the c axis, and carried fairly large faces of J120J, or were 

 tabular on jlOOj (Fig. 9). jlOlj was always well represented. 

 The crystals were slightly yellowish, and the cleavage parallel 

 to jOllj was especially pronounced. 



System : Rhombic bipyramidal. 



Axial constants : a : b : c=-9663 : 1 : 1-4005. 



Forms present (on both types of crystal habit) : flOU, {1201 



^ !100|. 



S. G.=2-281 at 20. 



2K 



