## Mg2SnSi Thermoelectric System Microstructure Data Over CALPHAD and Elastic Parameters Space

The total free energy of a heterogeneous system is ascribed by Eq.~\ref{eqn:tot_energy} where bulk free energy density ($f^{bulk}$), interfacial free energy density ($f^{int}$), and elastic energy density ($f^{elas}$), are the contributing factors. $latex$