Detalles de las estructuras de las fases tetragonales y temperaturas de las transiciones de fase de los compuestos \mathrm{Sr}_{2} \mathrm{MWO}_{6}(\mathrm{M}=\mathrm{Ni}, \mathrm{Zn}, \mathrm{Co}, \mathrm{Mg}, \mathrm{Cu}). Los datos presentados son los siguientes: referencia en la literatura (Ref.); parámetros de red (a, c); Distancias M-O1 y M-O2 en los octaedros \mathrm{MO}_{6}\left(d_{1}, d_{2}\right); ángulo de rotación de los octaedros \mathrm{WO}_{6} alrededor del eje c(\varphi); Temperatura de la transición de fase de la fase tetragonal a la fase cúbica \left(T_{c}\right); Parámetro de pseudosimetría para el grupo espacial F m \overline{3} m(\Delta). PT significa presente trabajo.
| Ref. | a(\AA) | c(\AA) | ( c / a \sqrt{2} ) | d_{1}(\AA) | d_{2}(\AA) | \frac{d_{2}}{d_{1}} | \varphi\left(^{\circ}\right) | T_{c}(\mathrm{~K}) | \Delta(\AA) |
|---|---|---|---|---|---|---|---|---|---|
| \mathrm{Sr}_{2} \mathrm{NiWO}_{6} | |||||||||
| [68] | 5.56 | 7.91 | 1.01 | - | - | - | - | 673 | - |
| [58] | 5.575 | 7.918 | 1.004 | - | - | - | - | 573 | - |
| [69] | 5.559 | 7.918 | 1.007 | - | - | - | - | 543 | - |
| [25] | 5.559 | 7.918 | 1.007 | 2.029 | 2.051 | 1.011 | 1.4 | 580 | 0.09 |
| [70] | 5.5571 | 7.9131 | 1.0069 | 2.042 | 2.018 | 0.988 | 7.3 | - | 0.49 |
| PT | 5.5608 | 7.9191 | 1.0070 | 2.029 | 2.027 | 0.999 | 8.3 | 588 | 0.56 |
| \mathrm{Sr}_{2} \mathrm{ZnWO}_{6}-tetragonal phase | |||||||||
| [68] | 5.60 | 8.01 | 1.0114 | - | - | - | - | 843 | - |
| [58] | 5.579 | 7.976 | 1.0109 | - | - | - | - | 703 | - |
| [32] | - | - | - | - | - | - | - | 670{ }^{\text {a }} | - |
| PT { }^{\text {b }} | 5.5973 | 7.9889 | 1.0092 | 2.034 | 2.068 | 1.016 | 10.3 | 773 | 0.71 |
| \mathrm{Sr}_{2} \mathrm{CoWO}_{6} | |||||||||
| [68] | 5.58 | 7.98 | 1.0112 | - | - | - | - | - | - |
| [58] | 5.596 | 7.978 | 1.0081 | - | - | - | - | 673 | - |
| [71] { }^{\text {c }} | 5.5828 | 7.9774 | 1.0104 | 2.055 | 2.082 | 1.013 | 7.2 | 659 | 0.50 |
| PT | 5.5820 | 7.9774 | 1.0106 | 2.092 | 2.090 | 0.999 | 8.7 | 703 | 0.58 |
| \mathrm{Sr}_{2} \mathrm{MgWO}_{6} | |||||||||
| PT | 5.5817 | 7.9390 | 1.0057 | 2.070 | 2.104 | 1.016 | 7.25 | 570 | 0.48 |
| \mathrm{Sr}_{2} \mathrm{CuWO}_{6} | |||||||||
| [72] | 5.42 | 8.40 | 1.10 | - | - | - | - | - | - |
| [73] | 5.431 | 8.410 | 1.095 | - | - | - | - | 1193 | - |
| [32, 26] { }^{\text {c }} | 5.422 | 8.395 | 1.095 | 1.9384 | 2.2834 | 1.1780 | 8.9 | 1170 | 0.60 |
| [74] | 5.42693 | 8.4087 | 1.0956 | 1.9604 | 2.3250 | 1.1860 | 10.5 | - | 0.70 |
| [75] | 5.4315 | 8.4024 | 1.0939 | - | - | - | - | - | - |
| [76] | 5.4290 | 8.4155 | 1.0961 | 1.9339 | 2.3227 | 1.2010 | 8.6 | - | 0.58 |
| PT(1) | 5.4291 | 8.4154 | 1.0961 | 1.955 | 2.322 | 1.188 | 10.9 | 1193 | 0.74 |
| \mathrm{PT}(2)^{\text {c }} | 5.4169 | 8.3976 | 1.0962 | 1.9616 | 2.3001 | 1.1726 | 9.2 | - | 0.61 |