The x-ray excitation spectra around Cu K-edge in sodium chloride crystals containing a small amount of Cu+ ions are measured at 11K to 200K. We found Cu+ ion displacements and growths to micro-clusters (micro-crystals) of CuCl2 in sodium chloride crystal by x-ray irradiation. The trace of the formation is presented by observing the XAFS spectra and XEOL (X-ray Excitation Optical Luminescence) intensities at various temperatures. Ar low temperature below about 50 K, the micro-clusters or the micro-crystals of CuCl2 hardly create. The higher temperature moves the ions faster and further, and makes more active to form the CuCl2 micro-crystals in bulk. The process of moving of the Cu+ ion is discussed.