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Observation of talc-tremolite interfaces by high resolution electron microscopy

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Abstract

Talc — a sheet silicate and tremolite — a chain silicate are found by electron microscopy and X-ray microanalysis to occur intergrown as bicrystals with sharp, fault-free boundaries in a talc-rich gemstone nephrite from Scortaseo, Puschlav Valley, Swiss Alps. The plane of intergrowth is the (010)-plane for both components. Curving, stepped interfaces are observed more rarely, and these suggest a reaction from tremolite to talc which stopped before completion. The Mg-ions necessary for this reaction may stem from the associated dolomite rock.

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Authors and Affiliations

  1. Edward Davies Chemical Laboratories, University College of Wales, Aberystwyth, England

    J. L. Hutchison

  2. Laboratorium für Festkörperphysik, ETH Zürich, CH-8093, Zürich, Switzerland

    H. -U. Nissen & R. Wessicken

Authors
  1. J. L. Hutchison
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  2. H. -U. Nissen
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  3. R. Wessicken
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Present address: Department of Metallurgy and Science of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, England

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Hutchison, J.L., Nissen, H.U. & Wessicken, R. Observation of talc-tremolite interfaces by high resolution electron microscopy. Phys Chem Minerals 4, 275–280 (1979). https://doi.org/10.1007/BF00307951

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  • DOI: https://doi.org/10.1007/BF00307951

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