Advertisement

Trace elements in precious and common opals using neutron activation analysis

  • G. D. McOrist
  • A. Smallwood
Article

Abstract

Neutron activation analysis (NAA) was used to determine the concentration of trace elements in 44 precious and 52 common opals sampled from a number of recognised fields within Australia. The purpose of this study was to determine if precious and common opals of the same colour and location have the same or a different trace element profile. Similar numbers of black, white and grey samples were studied in each case. In most cases common opals had a significantly higher concentrationof certain trace elements when compared with precious opals.

Keywords

Colour Physical Chemistry Inorganic Chemistry Activation Analysis Neutron Activation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J. V. Sanders, Nature, Dec. (1964) 1151.Google Scholar
  2. 2.
    R.K. Iler, The Chemistry of Silica, Wiley-Interscience, New York, 1979, p. 398.Google Scholar
  3. 3.
    P. J. Darragh, A. J. Gaskin, J. V. Sanders., Scientific American, 234 (1976) 84.Google Scholar
  4. 4.
    G. D. McOrist, A. Smallwood, J. J. Fardy, J. Radioanal Nucl. Chem., 185 (1994) 293.Google Scholar
  5. 5.
    R. I. Kostov, I. M. Pojarevski, Dokl. Bolg. Akad. Nauk., 41 (1988) 63.Google Scholar
  6. 6.
    F. Bartoli, R. D. Bittencourt, M. Doirisse, R. Meyer, R. Philippy, J. C. Samama, Eur. J. Mineral., 2 (1990) 611.Google Scholar
  7. 7.
    G. D. McORIST, A. Smallwood, J. Radioanal Nucl. Chem., 198 (1995) 499.Google Scholar

Copyright information

© Akadémiai Kiadó 1997

Authors and Affiliations

  • G. D. McOrist
    • 1
  • A. Smallwood
    • 2
  1. 1.ANSTO Environment DivisionLucas Heights Research LaboratoriesMenaiAustralia
  2. 2.Gemmological Association of AustraliaSydneyAustralia

Personalised recommendations