751676.fig.0010
Figure 10: The room temperature solid infrared absorption spectra recorded for (a) pure Bi2SrV2O9, (b) Bi2SrV1.95Mn0.05O9, (c) Bi2SrV1.9Mn0.1O9, (d) Bi2SrV1.8Mn0.2O9, (e) Bi2SrV1.7Mn0.3O9, (f) Bi2SrV1.6Mn0.4O9.