Journal of Radioanalytical and Nuclear Chemistry

, Volume 198, Issue 2, pp 499–510 | Cite as

Trace elements in coloured opals using neutron activation analysis

  • G. D. McOrist
  • A. Smallwood
Article

Abstract

Neutron activation analysis was used to determine the concentration of trace elements in 50 samples of orange, yellow, honey, green, blue and pink opals as well as 18 samples of colourless opals taken from a number of recognised fields in Australia, Peru, Mexico and USA. The results were evaluated to determine the relationship between trace element content and opal colour.

Keywords

Colour Physical Chemistry Inorganic Chemistry Activation Analysis Neutron Activation 

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References

  1. 1.
    J. V. SANDERS, Nature, Dec., (1964) 1151.Google Scholar
  2. 2.
    P. J. DARRAGH, A. J. GASKIN, J. V. SANDERS, Scientific American, 234 (1976) 84.Google Scholar
  3. 3.
    R. K. ILER, The Chemistry of Silica, Wiley-Interscience, New York, 1979, p. 398.Google Scholar
  4. 4.
    R. I. KOSTOV, I. M. POJAREVSKI, Dokl. Bolg. Akad. Nauk., 41 (1988) 63.Google Scholar
  5. 5.
    F. BARTOLI, R. D. BITTENCOURT, M. DOIRISSE, R. MEYER, R. PHILIPP J. C. SAMAMA, Eur. J. Mineral., 2 (1990) 611.Google Scholar
  6. 6.
    J. J. KOIVULA, C. W. FRYER, Gems Gemol., Winter (1984) 226.Google Scholar
  7. 7.
    G. D. McORIST, A. SMALLWOOD, J. J. FARDY, J. Radioanal. Nucl. Chem. 185 (1994) 293.Google Scholar
  8. 8.
    C. E. ASHBAUGH, Gems Gemol., Winter (1988) 196.Google Scholar
  9. 9.
    G. R. ROSSMAN, Y. QIU, Gems Gemol., 18 (1982), 87.Google Scholar
  10. 10.
    R. A. DUGDALE, Br. J. Appl. Phys., 4 (1953) 334.Google Scholar

Copyright information

© Akadémiai Kiadó 1995

Authors and Affiliations

  • G. D. McOrist
    • 1
  • A. Smallwood
    • 2
  1. 1.ANSTD Environmental Science ProgramLucas Heigths Research LaboratoriesMenai(Australia)
  2. 2.Gemmological Association of AustraliaSydney(Australia)

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