( 611 ) 



The binodal surface L X L 3 intersects the saturation surfaces Am and D; 



we have, therefore, one series of two liquid phases, saturated with 

 solid (NH 4 ) 2 S0 4 , and one series saturated with solid LiNH 4 S0 4 . The 

 binodal surface L x l L t x intersects the two saturation surfaces D and Li. 

 We have, therefore, one series of two liquid phases saturated with 

 LiNH 4 S0 4 (curve k s d x and k t d^, and one series saturated with 

 Li 2 S0 4 . H 2 (curve k 4 d x and k 4 d 3 ). By c/, and d 9 are represented 

 two liquid phases which are in equilibrium with each other and 

 saturated with LiNH 4 S0 4 and Li a S0 4 . H a O. Of the series of the 

 critical liquids represented by the curve kJc A , k a is saturated with 

 LiNH 4 S0 4 and k t with Li a S0 4 . H a O. 



The curve Ac which indicates the liquids saturated with LiNH 4 S0 4 

 without any excess of either of the components runs between the 

 two heterogeneous regions. From this it follows that this double 

 salt at 30° cannot give two liquid phases with water-alcohol mixtures. 



We, therefore, have at 30° the following equilibria in the quaternary 

 system. 



liquids saturated with 



1. (NH 4 ) 2 S0 4 , represented by the surface Am 



2. LiNH 4 SO, , „ „ „ „ D 



3. Li 2 S0 4 H 2 0, ,, „ ,, ,, Li 



4. (NH 4 ) 2 S0 4 and LiNH 4 S0 4 „ „ the curves: bb x and h^A 



5. Li 2 S0 4 H 2 0and LiNH 4 S0 4 ,, ,, „ „ dd x and d^A 



system of two liquid phases : 



6. in itself represented by the surface XjL 2 

 7 T ' T ' 



8. saturated with (NH 4 ) 2 S0 4 , represented by the curves a x b x and aj)^ 



9- „ „ LiNH 4 S0 4 , „ „ „ „ b t K, and bjv 2 



10. „ „ LiNH 4 S0 4 , „ „ „ „ d x K M anddf s iT, 



11- » „ Li a S0 4 H 2 0, ,, „ „ „ d x K i andc/.A 7 ", 



two liquid phases saturated with : 



12. (NH 4 ) 2 S0 4 and LiNH 4 S0 4 , represented by the points : b x and b, 



13. Li a S0 4 H 2 and LiNH 4 S0 4 , „ „ „ „ d x and d, 



critical liquids : 



14. one series represented by the curve K X K % 



16. one critical liq. saturated with LiNH 4 S0 4 , represented by the point K a 

 17 - » » >, r, „ LiNH 4 S0 4 , „ „ „ „ K z 



!"• » » '. >> ,, Li s S0 4 H„0, ,, ,, ,, ,, K 4 



