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VHal centres were studied by EPR in SrS doped with halogens after X‐raying the samples at 77 K. VHal centre arises when a hole is captured by sulphide‐ion next to a cation vacancy with a halogen ion substituting the opposite sulphide‐ion. EPR parameters and thermal decay characteristics are measured for VCl, VBr, and VI centres. The efficiency of different halogens to produce and stabilise cation vacancies is shown to vary for different alkaline earth sulphides. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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Seeman et al. (2006) studied this question.
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