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Ideal Mixing Model and Solid Solutions


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With the new update in GWB that allows solid solutions, does the ideal mixing setting model solutions have an ideal molecular mixing model or an ideal site mixing model?

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Hello,

The ideal solid solution model currently does not accommodate site mixing. Please refer to section 2.5 in the GWB Essentials User Guide for more information on solid solution models supported in the GWB. 

Hope this helps,
Jia Wang
Aqueous Solutions LLC
 

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Hello again,

If you are interested in ideal site mixing, you can edit the thermo dataset to include factored versions of the end members, scaling the stoichiometry such that the site mixing parameter for your binary solid solution is equal to one. By doing so, ideal molecular mixing and site mixing becomes equivalent. 

Hope this helps,
Jia

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