Equilibrium

[Ash]

Hello
I am new to the phreeqc software.
I have a rock sample containing MgO, MnO, Al2O3 , Na2O, K2O, SiO2, Fe2O3, TiO2, P2O5, CO3-, C(organic), Uranium, CaO. Sulphuric acid is added to this rock sample. How can I find the amount of each of these minerals in the rock and the amount that has been leached by the acid, at equilibrium ?
Sorry if I am asking a very basic question.
Thank You.

[dlparkhurst]

I don't think PHREEQC is the tool to determine the minerals in the rock. You need X-ray diffraction or microscope work to evaluate the minerals and their abundance.

Given a set of minerals, then PHREEQC could calculate the composition of a solution produced by allowing a set amount of acid to react with the minerals with specified abundance (EQUILIBRIUM_PHASES). Either the minerals will completely dissolve, or will react to equilibrium. If you do not want any of the minerals to precipitate in the process, you can use the -dissolve_only option.

[dlparkhurst]

You have atomic abundances, but those are not the minerals that are present.

Perhaps not pure sulfuric acid, but PHREEQC can manage a relatively concentrated sulfuric acid solution. To be honest, I don't think PHREEQC is the tool for you.

[Ash]

Okay sir.
Thank You