751676.fig.004a
(a)
751676.fig.004b
(b)
Figure 4: Thermogravimetric (TGA) and differential thermal analyses (DTA) curves recorded for green mixture of pure and some selected Mn-doped 212-Bi-Sr-V-O system where (a): Bi2SrV2O9, (c): Bi2SrV1.9Mn0.1O9 and (e): Bi2SrV1.7Mn0.3O9.