Sr2CuO2(CO3) was prepared at 1273 K and 0.01 MPa CO2 partial pressure in a flowing gas of O2CO2 using a mixture of SrCO3 and CuO powders as a starting material. The compound has a tetragonal structure with lattice constants a = 7.8045(1), and c = 14.993(1) A ̊, and its space group is 14. The formula per unit cell is 8 Sr2CuO2(CO3), and measured and calculated densities are Dm = 4.71 g/cm3, and Dx = 4.81 g/cm3, respectively. The crystal structure was refined by Rietveld analysis on X-ray powder diffraction and neutron powder diffraction data. The final residuals (RF) were 4.31 and 4.27% for the X-ray and neutron data, respectively. The structure consists of deformed [CuO6] octahedrons and layers of ordered triangular CO3 groups. Sr atoms having eight near oxygen neighbors are between the [CuO6] octahedrons and the CO3 layers.
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering