💻 Continuing the visualization of the obtained dataset of thermodynamic calculations for 40 samples of hypersaline mine water from the Kryvyi Rih iron ore basin (modeling in PHREEQC, FREZCHEM database). ❗ The calculation of cascade eutectic freeze crystallization reveals a fundamentally picture: 🔹 Stage 1 (0 … −20°C): down to −6.5…−9.5°C, only pure ice freezes out (freezing point depression zone). Then, the precipitation of mirabilite (Na₂SO₄·10H₂O) begins. 🔹 Interstage buffer (−20.0 … −22.5°C, yellow band): key technological buffer (ΔT = 2.5°C). In this range, exclusively secondary ice crystallizes. In none of the 40 samples does hydrohalite precipitate earlier than the calculated −22.5°C. 🔹 Stage 2 (−22.5 … −35°C, orange zone): avalanche-like precipitation of hydrohalite (NaCl·2H₂O). #Geochemistry #WaterManagement #PHREEQC #DataScience #EnvironmentalEngineering #Mining #SvystunovaGully #KryvyiRihBasin #EFC #EutecticFreezeCrystallization #FREZCHEM #RStats