Abstract
The phase diagram of the BaO(BaCO3)‐CaO‐CuO system, especially in the barium‐rich region at 900°C in air, was studied. Two new different oxycarbonates were observed: Ba8Ca16/15Cu64/15O11.20(CO3)2.66and a solid‐solution series with a chemical composition of Ba2Cax+yCu1+(x/2)‐yO2+delta(CO3)1‐z(where 0 ≤ to x≤ to 2/39 and 0 ≤ to y≤ to 16x/5). The oxycarbonate solid solution was formed in a region of the compositional triangle Ba:Ca:Cu (in moles) = (2:0:1)‐(39:1:20)‐(65:7:28). The solid‐solution structure had P4/mmm symmetry, with lattice parameters a similar/congruent apand c similar/congruent 2ap, where aprepresents the perovskite cell. The Ba8Ca16/15Cu64/15O11.20(CO3)2.66compound, which had Pm3m symmetry with a lattice parameter a= 0.8116(2) nm, had no chemical‐solubility range.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
