Overcoming the Problems of High-Resolution Transmission Electron Microscopy of Biogenic Aragonite

S. E. Ness, D. W. Haywick and C. Cuff
Department of Geology, James Cook University of North Queensland, Townsville, Queensland 4811, Australia

Abstract: High-resolution transmission electron microscopy of biogenic carbonate minerals is hampered by a lack of stability during exposure to the electron beam. However, aragonite in bivalve shells may be successfully imaged using a modification of the ‘minimal-exposure technique’ of Williams and Fisher (1970). Diffraction patterns taken before and after beam exposure indicate that the aragonite remained stable during imaging. The procedure described here should prove useful for further studies of the ultrastructure and/or the diagenesis of biogenic carbonate minerals.

Keywords: transmission electron microscopy • carbonate minerals • aragonite

Mineralogical Magazine; December 1990 v. 54; no. 377; p. 589-592; DOI: 10.1180/minmag.1990.054.377.09
© 1990, The Mineralogical Society
Mineralogical Society (www.minersoc.org)