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

Autor:	L. V. Bershov, I. D. Ryabov, A. V. Speranskiy, I. G. Ganeev
Rok vydání:	1983
Předmět:	Electron nuclear double resonance Anhydrite Chemistry Radical Analytical chemistry Spin hamiltonian law.invention chemistry.chemical_compound Nuclear magnetic resonance Geochemistry and Petrology law General Materials Science Electron paramagnetic resonance Hyperfine structure Rotation group SO
Zdroj:	Physics and Chemistry of Minerals. 10:21-26
ISSN:	1432-2021 0342-1791
DOI:	10.1007/bf01204322
Popis:	Electron paramagnetic resonance (EPR) measurements of natural anhydrite CaSO4, celestite SrSO4 and barite BaSO4 have revealed the presence of PO 3 2− 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.
Databáze:	OpenAIRE
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