Magnetic interaction in biotites and oxidised biotites

descriptionPublicationkeyboard_double_arrow_right Article 01 Oct 1987 English Publisher:Springer Science and Business Media LLCJournal:Physics and Chemistry of Minerals, volume 15, pages 71-77 (issn: 0342-1791, eissn: 1432-2021,

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Authors: G. Longworth; M. G. Townsend; R. Provencher; H. Kodama;

doi: 10.1007/bf00307611

Magnetic interaction in biotites and oxidised biotites

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Abstract

Mossbauer spectra of biotites (1) and (2) with relative iron concentrations ∼1:1·6 and of their oxidation products are recorded at 4 K in zero field and in applied fields up to 5 T. Magnetic susceptibility data are also reported. The results show that Fe III spins are in a ferromagnetic configuration in the c-plane in both biotites. Partial oxidation of biotite (1) leads to a canted ferromagnetic structure, while complete oxidation of biotite (2) yields an antiferromagnetic spin configuration.

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