Sr2CuO2Cl2. Represents an almost great scenario of the 2-D antiferromagnetic CuO2-airplane and thus is of particular desire during the context with the origins of significant TC superconductivity. We've measured experimentally and analyzed theoretically the Ti 2p X-ray photoemission spectra (XPS) and the resonant enhancement of valence photoemissionat the Ti 2p https://okada4dsg.com/