Physicochemical characterization of aqueous precipitation-based powders. (A) XRD patterns, (B) IR spectra, (C) lattice parameters (a and c), and (D) colors of the BCP, Cu0.1BCP and Cu0.2BCP powders heat treated at 1050 °C for 2 h under 93 kPa of N2 and 7 kPa of H2O. The hexagonal structure, P63/m (176) space group, according to ICCP-PDF 9–432, and trigonal structure, R3c (167) space group, according to ICCP-PDF 9–169, were used for XRD phase identification. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)