Distribution Coefficient of Manganese in Sodium Chloride Crystal Determined by Electron Spin Resonance

The distribution coefficient of divalent manganese in sodium chloride single crystals grown from the melt was determined by Electron Spin Resonance (ESR) absorption techniques at room temperature and at a wavelength of 3 cm. The crystals were grown by a method similar to that described by Kyropoulos. There were two initial concentrations from which the crystals were grown: 0.5 and 1 at.% manganese in sodium chloride. Graphs were obtained that show the dependence of the fractional impurity concentration as a function of the fraction of melt which has been solidified.