Sr2CuO2Cl2. Represents an almost great situation of a 2-D antiferromagnetic CuO2-aircraft and therefore is of certain interest within the context from the origins of substantial TC superconductivity. We have calculated experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) and the resonant improvement of valence photoemissionat the Ti https://okada4dsg.com/