Crystal structure of \mathrm{Sr}_{2} \mathrm{MgWO}_{6} at room temperature. The atomic positions (in fractional coordinates) and temperature factors were refined in the I 4 / m space group, using conventional x-ray diffraction data obtained with radiation \mathrm{Cu} \mathrm{K} \alpha. (Note: a=5.5817(1) \AA; c=7.9390(1) \AA; R_{\mathrm{p}}=8.66 \%; R_{\mathrm{wp}}=12.5 \%; R_{\text {exp }}=5.27 \%; \chi^{2}=5.64.)
| Atom | Site | x | y | z | B_{\text {iso }}\left(\AA^{2}\right) |
|---|---|---|---|---|---|
| W | 2 a | 0 | 0 | 0 | 0.10(1) |
| Mg | 2 b | 0 | 0 | 1 / 2 | 0.25(7) |
| Sr | 4 d | 0 | 1 / 2 | 1 / 4 | 0.54(2) |
| O 1 | 8 h | 0.209(1) | 0.270(1) | 0 | 1.3(2) |
| O 2 | 4 e | 0 | 0 | 0.235(1) | 0.5(2) |