Temperature evolution of the $\mathrm{GM}_{4}^{+}, \mathrm{X}_{3}^{+}$and $\mathrm{X}_{5}^{+}$mode amplitudes, as obtained from refinement of the NPD data for $\mathrm{SrLaZnRuO}_{6}$ (blue, opened symbols) and $\mathrm{SrLaMgRuO}_{6}$ (red, closed symbols). Dashed lines indicate the temperature range of coexistence between the $P 2_{1} / n$ and $R \overline{3}$ phases.
Temperature evolution of the \mathrm{GM}_{4}^{+}, \mathrm{X}_{3}^{+}and \mathrm{X}_{5}^{+}mode amplitudes, as obtained from refinement of the NPD data for \mathrm{SrLaZnRuO}_{6} (blue, opened symbols) and \mathrm{SrLaMgRuO}_{6} (red, closed symbols). Dashed lines indicate the temperature range of coexistence between the P 2_{1} / n and R \overline{3} phases.