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Single crystal Mössbauer studies of 1M biotite

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Abstract

Electric field gradient (EFG) measurements for Fe2+ in the cis- and trans-sites of a large single crystal of trioctahedral biotite of the lM polytype are described. Attempts to apply thickness and polarisation corrections are outlined. The measured EFG's are distinctly rhombic: η = 0.28 and 0.42 respectively for the cis- and transsites and the EFG principal directions lie approximately along the crystallographic axes. For the cis-site V yŷ lies close to the normal to the basal plane while for the transsite \(V_{\hat z\hat z}\) lies close to this direction.

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Authors and Affiliations

  1. Chemistry Division, Department of Scientific and Industrial Research, Private Bag, Petone, New Zealand

    Laurence P. Aldridge, James Finch, Graeme J. Gainsford, Kevin H. Patterson & W. Craighead Tennant

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  1. Laurence P. Aldridge
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  2. James Finch
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  3. Graeme J. Gainsford
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  4. Kevin H. Patterson
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  5. W. Craighead Tennant
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Aldridge, L.P., Finch, J., Gainsford, G.J. et al. Single crystal Mössbauer studies of 1M biotite. Phys Chem Minerals 17, 583–590 (1991). https://doi.org/10.1007/BF00203837

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  • DOI: https://doi.org/10.1007/BF00203837

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