Electron spin resonance study of the superoxide ion in melt-recrystallized strontium chloride
- 1 January 1974
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics
- Vol. 70, 45-52
- https://doi.org/10.1039/f29747000045
Abstract
An e.s.r. spectrum in melt-recrystallized SrCl2 single crystals has a fully anisotropic g-tensor with principal values 2.0028, 2.0093 and 2.053 in directions oriented in the crystal as [110], and [1 text-decoration:overline10] and [001]. The spectrum is ascribed to O– 2 in a site of D2h symmetry between two anion vacancies, and interacting with two Sr2+ ions so that the unpaired electron resides in a B2g orbital localized mainly on the O– 2. The crystal field splitting Δ between B2g and B3g(O2πg(x) and πg(y) mixed with Sr 4d) is about 40 times the spin-orbit coupling constant, i.e. about 0.9 eV. When Δ is so large, the orbital angular momentum reduction parameter cannot be estimated accurately from the g-tensor.Keywords
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