WATER OF CRYSTALLIZATION. 



1.5 and 2)U, are well defined, considering the great opacity of the sub- 

 stance. 



70% 



50 



40 



to 



"I" 



c 



10 



h 



10 



3 4 5 6 7 



FIG. 13. Blodite (a); Thaumasite (b). 



KIG. 14. Hydrotalcite. 



