> We expect that the two solid solutions behave differently. Therefore we need to use each one separately in the same solution. Is there a way to do that other than putting both solid solutions in one SOLID_SOLUTIONS data block so Phreeq can consider both of them separately. You can define multiple solid solutions, each with two or more components, in a single SOLID_SOLUTION data block. I think this is what you want. Each solid solution will react with the solution to obtain equilibrium. If you look at the manual (p. 144), the example defines a sulfate and a carbonate solid solution, which would react independently with the same solution. David David Parkhurst (dlpark@xxxxxxxx) U.S. Geological Survey Box 25046, MS 413 Denver Federal Center Denver, CO 80225 Project web page: https://wwwbrr.cr.usgs.gov/projects/GWC_coupled
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