A summary of the symmetries and phase transitions reported for compounds with the general formula \mathrm{Sr}^{2+} L n^{3+} M^{2+} \mathrm{Ru}^{5+} \mathrm{O}_{6}^{2-}. t stands for tolerance factors calculated from (a) the ionic radii in [48] and (b) Rietveld refinement interatomic distances (the strontium and rare-earth radius in nine coordination is chosen since it is the highest coordination number available for all tabulated rare-earths); symmetry of the structure at room temperature; transition temperature; intermediate-phase symmetry and high temperature phase symmetry; literature reference. PW stands for present work.
| Compound | (a) t | (b) t | RT symmetry | \mathrm{T}_{\text {trans }} | High symmetry | Ref. |
|---|---|---|---|---|---|---|
| \mathrm{SrLaNiRuO}_{6} | 0.9266 | 0.9460 | P 2_{1} / n | 670 K | R \overline{3} | [116] |
| \mathrm{SrLaMgRuO}_{6} | 0.9198 | 0.9534 | P 2_{1} / n | 673 K | R \overline{3} | Chap. 7 |
| \mathrm{SrLaCuRuO}_{6} | 0.9176 | 0.9458 | P 2_{1} / n | 730 K | R \overline{3} | [116] |
| \mathrm{SrLaCoRuO}_{6} | (LS)0.9357 (HS)0.9143 | 0.9439 | P 2_{1} / n | [111] | ||
| 0.9457 | P 2_{1} / n | [115] | ||||
| \mathrm{SrLaZnRuO}_{6} | 0.9154 | 0.9422 | P 2_{1} / n | 923 K | R \overline{3} | Chap. 7 |
| \mathrm{SrNdNiRuO}_{6} | 0.9174 | 0.9358 | P 2_{1} / n | 500 \mathrm{~K}, 900 \mathrm{~K} | P 4_{2} / n, Fm \overline{3} m | Chap. 5 |
| \mathrm{SrNdMgRuO}_{6} | 0.9108 | 0.9380 | P 2_{1} / n | 580 \mathrm{~K}, 920 \mathrm{~K} | P 4_{2} / n, Fm \overline{3} m | Chap. 5 |
| \mathrm{SrNdCoRuO}_{6} | (LS)0.9265 (HS)0.9053 | 0.9359 | P 2_{1} / n | 660 \mathrm{~K}, 980 \mathrm{~K} | P 4_{2} / n, Fm \overline{3} m | Chap. 5 |
| \mathrm{SrNdZnRuO}_{6} | 0.9064 | 0.9301 | P 2_{1} / n | 780 \mathrm{~K}, 1120 \mathrm{~K} | P 4_{2} / n, Fm \overline{3} m | Chap. 5 |
| \mathrm{SrPrNiRuO}_{6} | 0.9202 | 0.9389 | P 2_{1} / n | 1100 K | R \overline{3} | Chap. 6 |
| \mathrm{SrPrMgRuO}_{6} | 0.9135 | 0.9420 | P 2_{1} / n | 900 K | R \overline{3} | Chap. 6 |
| SrPrCoRuO6 | (LS)0.9293 (HS)0.9080 | 0.9373 | P 2_{1} / n | 1000 K | Chap. 6 | |
| \mathrm{SrPrZnRuO}_{6} | 0.9091 | 0.9324 | P 2_{1} / n | 1300 K | Chap. 6 |