The influence of activity coefficient and equilibrium constant models on the speciation of aqueous solutions of H&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt;–MgSO&lt;sub&gt;4&lt;/sub&gt;–Al&lt;sub&gt;2&lt;/sub&gt;(SO&lt;sub&gt;4&lt;/sub&gt;)&lt;sub&gt;3&lt;/sub&gt; at 235 and 250°C
Physicochemical Problems of Mineral Processing