PHREEQC¶ Which database covers a system, how two databases differ, and how a mineral’s log K varies with temperature in each. 01 - Database Comparison Asking about a system, not a database The plots What it concludes Source 02 - Phreeqc Relationships The hierarchy The plots What it is for Source 03 - Calcite and Quartz in Four Databases Calcite Quartz What it concludes Source