In a monotectic system, at what point does the separation of two immiscible liquid phases occur, and how does this relate to the conditions at a triple point?

In a monotectic system the single liquid phase splits into two immiscible liquids when the temperature reaches the monotectic temperature, the point where the liquid line meets the liquidus lines of both components. At this temperature the liquid phase is in equilibrium with two separate liquid phases, so the mixture suddenly separates into a NaCl‑rich liquid and a KCl‑rich liquid, for example. This situation is analogous to a triple point because three phases—two liquids and the solid of one component—are in mutual equilibrium at the same temperature and pressure. The monotectic point therefore behaves like a triple point, but with two liquids instead of a solid, liquid, and gas. Thus, the separation of two immiscible liquid phases occurs exactly at the monotectic temperature, mirroring the coexistence conditions seen at a triple point.