Physics and Chemistry of Minerals

, Volume 22, Issue 6, pp 399–405 | Cite as

Characterization of lattice strain induced by neutron irradiation

  • Hsin-Yi Tseng
  • Peter J. Heaney
  • T. C. Onstott
Article

Abstract

Powder X-ray diffraction and Rietveld refinement have been used to study structural damage induced by neutron irradiation of orthoclase (Or94) from Benson Mines, New York. X-ray diffraction profiles of samples exposed to total neutron doses in excess of 6.3×1018 n/ cm2 exhibit small but measurable peak broadening in comparison with unirradiated orthoclase. Rietveld structure refinements and transmission electron microscope observations indicate that the X-ray peak broadening arises primarily from the effect of strain rather than particle size. The results reveal a positive correlation between the neutron dose and the anisotropic strain percentage calculated from the Lorentzian profile parameters. This strain-induced broadening probably stems from numerous point defects created by recoiling atoms during neutron collisions. These observations have important implications for the diffusive behavior of 39Ar and 40Ar.

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Copyright information

© Springer-Verlag 1995

Authors and Affiliations

  • Hsin-Yi Tseng
    • 1
  • Peter J. Heaney
    • 1
  • T. C. Onstott
    • 1
  1. 1.Department of Geological and Geophysical SciencesPrinceton UniversityPrincetonUSA

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