818 
a) The five phases form a concentration-diagram-type as in fig. 1. 
From the position of the phases with respect to one another 
follow the reactions : 
AS DB a RE Et B | ee 
ALEID Fe OS ir ae 
AA BE IN cee os Tuor gee A 
and from this: 
CAD) CO) TIDI LEN ere OS EEN 
(A}(C) | (D) | (B) (4) (3a) 
(A) (C) | (4) | B) (D) (da) 
It appears from 2a, 38a and 4a that the curves (4) and (B) are 
situated at different sides of each of the three curves ((’), (D) and 
(E). As (A) and (B are singular curves and they coincide, 
therefore, with the (J/)-curve, the (M)-eurve is consequently bidirec- 
tionable. We draw, therefore, in a P,7-diagram the curves (A), (B) 
and (M) as in fig. 2. 
£ 
Fig. 1. Fig. 2. 
At the one side of the (M)-eurve we draw curve (D) [fig. 2]; 
at the other side of the (J/)-curve are situated then the curves (C’) 
and (#), of which the position with respect to (A) and (B) has still 
to be defined. It appears from 3a that (A) and ((’) are situated at 
the one and (B) and (£) at the other side of curve (/); the curves 
(C) and (/) are situated, therefore, as in fig. 2. 
We see that this diagram is also in accordance with 2a and 4a. 
6) The five phases form a type of concentration-diagram as 
in fig. 3. 
From the position of the phases with respect to one another 
follows: 
(A) DERK CBE oe er 70 ree 
AOL CD) Bale reeks Sadee 
( 
AD 0D CRY CEB 2 1E DAD ltr ere 
