Compounds and subsolidus phase relations in the image system

We have investigated the subsolidus phase relations in the system image at image under 1 atm of oxygen by means of powder X-ray diffraction method. Apart from the three known phases of image, image and (image spinel image, two misfit-layered cobaltates have been identified. The first misfit is a solid solution, having a chemical formula image with image, while the other misfit has a pinpoint composition of image. Both the phases have an incommensurate b-axes ratio, image, due to the size difference between the two subsystems. Another phase is found in the Cu-rich quasi-one-dimensional composite crystal image, but the terminal compound image is not synthesized. The octahedral Co site in the image phase can be partially substituted with Cu, up to 6%, to form the image solid solution.