Abstract

Iridium-doped Bridgman-grown NaCl single crystals were studied with electron paramagnetic resonance and electron nuclear double resonance after irradiation at 77 K. An orthorhombic-I (IrCl6)4– complex, charge compensated by two next-nearest neighbour vacancies was detected. After annealing at 180 K this complex decays by cither vacancy diffusion or an electronic process. The Ir 2+complex is compared with the Rh2+ complex formed in the same conditions in NaCl crystals grown from solution.

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