Sr2CuO2Cl2. Signifies a virtually perfect circumstance of the 2-D antiferromagnetic CuO2-aircraft and thus is of particular interest while in the context with the origins of high TC superconductivity. We now have calculated experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) and the resonant improvement of valence photoemissionat https://okada4dsg.com/