F. Callens et al., ELECTRON-NUCLEAR DOUBLE-RESONANCE OF A NEARLY AXIAL RH2-GROWN NACL-CRYSTALS( CENTER IN SOLUTION), Journal of applied physics, 84(1), 1998, pp. 422-427
Rh3+-doped NaCl single crystals grown from aqueous solution were studi
ed with electron paramagnetic resonance and electron nuclear double re
sonance after irradiation at liquid nitrogen temperature. [RhCl6](4-)
complexes with two next-nearest neighbor charge compensating vacancies
have been detected. The two vacancy-Rh2+ axes make an angle of 90 deg
rees to each other and are perpendicular to the center symmetry axis.
After warming the sample, this center with C-2 upsilon symmetry decays
consecutively into two other [RhCl6](4-) centers reported earlier in
Rh3+-doped NaCl and AgCl Bridgman crystals on the one hand, and/or in
solution-grown NaCl:Rh3+ crystals irradiated at room temperature on th
e other hand. (C) 1998 American Institute of Physics.