fig4

Figure 4. Experimental (filled symbols) and simulated (solid lines) temperature dependent (A) Seebeck coefficient, (B) electrical conductivity, (C) thermal conductivity, (D) lattice and bipolar thermal conductivity, (E) power factor and (F) figure of merit for different doping and Mg concentrations for Mg_2-δSi_0.3-ySn_0.7Sb_y. Theoretical results were obtained from a single parabolic band (SPB) model. Only samples where the Hall effect was measured, were modelled. For some samples, the height of the error bars is lower than the size of the symbol, hence not visible.