Interestingly, upon addition of 10 % Ni 2+ , there is a reorientation of the films along the (112) plane (Figure ). However, despite the orientational change, the patterns clearly show that the 3D perovskite structure is maintained in these films. We initially hypothesized that this result could be due to the insolubility of the precursor NiI2 at these concentrations, causing it to precipitate more quickly onto the substrate resulting in new orientation of the films. However, when we increase the concentration of Ni 2+ further (13 -15 % Ni 2+ ), we note that the orientation of the films reverts back to (110) as observed in the lower concentrated samples (Figure ). Therefore, we rule out the possibility that this response is due entirely to the solubility of NiI2 under these conditions. This behavior likely indicates that there is a secondary factor playing a role during the crystallization of these materials. The cause and nature of this response remains unknown.