272 



MOREY 



AKT. G 



perature the liquid traces the curve Q2Q1, the triangle A^i 

 becomes smaller, while the triangles A21V and Anv become larger. 

 The values of the coefficients of (7?' — 7/O and (r?" — v^) in the 



200 400 600 000 fooa 



TeMP£f)AruR£ 



Fig. 7. The ternary system, H2O-K2O -8102-8102. This diagram 

 shows the experimentally determined p-< curves for the various uni- 

 variant equilibria. The dot-dash curves represent univariant equilibria 

 in the binary systems, HjO-KjO-SiOz and HjO-KaO- 28102; the full 

 curves the ternary univariant equilibria, V -|- L -f- 2 solids; the dotted 

 curves the ternary univariant equilibria, V + 3 solids. The invariant 

 points Qsa and Qsb are shown as point Qs, and the curves 11 and 12 

 are not shown. 



numerator and (v' — v') and {v" — v^) va. the denominator thus 

 increase rapidly. Since the value oi {v^ — V) is comparatively- 

 large, this increase in the coefficients at first affects materially 



