Copper scandium zirconium phosphate: occupancy of the M1 and M2 sites in the temperature range 100-300 K

Cu₂ScZr(PO₄)₃ adopts a NASICON-type structure. Changes in the site-occupancy factors of the nonframework Cu⁺ cations suggest increased mobility around a circular orbit close to the M1 site at room temperature, but no movement into or out of the M2 site.