Crystal structure data and refinement results for \mathrm{Sr}_{2} \mathrm{Mn}^{3+} \mathrm{WO}_{6+\delta} at room temperature. The atomic positions (in fractional coordinates) and temperature factors were refined in the space group I 4 / m. (Note: a=5.6353(1) \AA; c=8.0149(1) \AA and V=254.53(1)^{3}; R_{\mathrm{p}}=10.6 \%; R_{\mathrm{wp}}=15.1 \%; R_{\text {exp }}=5.42 \%; \chi^{2}=7.73).
| Atom | Site | x | y | z | \mathrm{~B}\left(\AA^{2}\right) |
|---|---|---|---|---|---|
| W | 2 a | 0 | 0 | 0 | 0.33(7) |
| Mn | 2 b | 0 | 0 | 1 / 2 | 0.37(2) |
| Sr | 4 d | 0 | 1 / 2 | 1 / 4 | 0.74(3) |
| O 1 | 4 e | 0 | 0 | 0.241(2) | 1.05(4) |
| O 2 | 8 h | 0.219(2) | 0.276(1) | 0 | 1.05(4) |