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Electron paramagnetic resonance of PO 2−3 and SO −3 radicals in anhydrite, celestite and barite: the hyperfine structure and dynamics

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Abstract

Electron paramagnetic resonance (EPR) measurements of natural anhydrite CaSO4, celestite SrSO4 and barite BaSO4 have revealed the presence of PO 2−3 and SO −3 radicals. Hyperfine structure from33S has been detected and measured for the first time. Low-symmetry effects, which are manifested in noncoincidence of g and hyperfine axes, were observed for SO −3 . The dynamics of one of the two SO −3 types in anhydrite has been investigated. Variations of spin Hamiltonian parameters with temperature have been attributed to thermally induced jumps between the two magnetically inequivalent sites of this center.

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Authors and Affiliations

  1. IGEM, Academy of Sciences of the USSR, Staromonetniy 35, 109017, Moscow, USSR

    I. D. Ryabov, L. V. Bershov, A. V. Speranskiy & I. G. Ganeev

Authors
  1. I. D. Ryabov
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  2. L. V. Bershov
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  3. A. V. Speranskiy
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  4. I. G. Ganeev
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Ryabov, I.D., Bershov, L.V., Speranskiy, A.V. et al. Electron paramagnetic resonance of PO 2−3 and SO −3 radicals in anhydrite, celestite and barite: the hyperfine structure and dynamics. Phys Chem Minerals 10, 21–26 (1983). https://doi.org/10.1007/BF01204322

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  • DOI: https://doi.org/10.1007/BF01204322

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