Sr2CuO2Cl2. signifies a nearly suitable scenario of a 2-D antiferromagnetic CuO2-aircraft and therefore is of individual desire in the context of the origins of higher TC superconductivity. We now have measured experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) as well as the resonant improvement of valence https://okada4dsg.com/