Figure 5.

Coexistence lines for $t=0.05,0.5,1.0$. The coexistence line shrinks toward the tricritical point (red dot) when $t\to 0$. For each curve, the dilute phase is shown in green and the concentrated phase is shown in blue. Coexisting states are connected by tie lines (dotted segments). The volume fraction of each phase is determined (black arrows) according to Eq. 15. To see this figure in color, go online.