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Radiation resistance of LaPO4 (monazite structure) and YbPO4 (zircon structure) from data of computer simulation

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Abstract

The radiation resistance of the monazite LaPO4 and the compound YbPO4 (zircon structure type) has been investigated using the computer simulation. The number of Frenkel pairs, which are formed in the structure of these minerals after the passage of a primary knock-on thorium atom with an energy of 30 keV, has been calculated by the molecular dynamics method. The formation of Frenkel pairs and their recombination in the motion of recoil nuclei in the structure of the studied minerals have been discussed. It has been shown that the probability of the “survival” of Frenkel pairs in the LaPO4 monazite is significantly lower than in the YbPO4 compound. The tendency of these minerals toward amorphization under radiation damage has been described numerically. The obtained results have demonstrated that one of the main factors determining the radiation resistance of orthophosphates LnPO4 is the type of crystal structure, and the compounds with the monazite structure are more radiation resistant than the compounds with the zircon structure.

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Authors and Affiliations

  1. Institute of Geochemistry, Mineralogy, and Ore Formation, Palladina av. 34, Kyiv, 03680, Ukraine

    A. E. Grechanovsky

  2. Moscow State University, Moscow, 119991, Russia

    N. N. Eremin & V. S. Urusov

  3. Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry, Russian Academy of Sciences, Staromonetnyi per. 35, Moscow, 119017, Russia

    V. S. Urusov

Authors
  1. A. E. Grechanovsky
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  2. N. N. Eremin
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  3. V. S. Urusov
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Correspondence to A. E. Grechanovsky.

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Original Russian Text © A.E. Grechanovsky, N.N. Eremin, V.S. Urusov, 2013, published in Fizika Tverdogo Tela, 2013, Vol. 55, No. 9, pp. 1813–1819.

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Grechanovsky, A.E., Eremin, N.N. & Urusov, V.S. Radiation resistance of LaPO4 (monazite structure) and YbPO4 (zircon structure) from data of computer simulation. Phys. Solid State 55, 1929–1935 (2013). https://doi.org/10.1134/S1063783413090138

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  • DOI: https://doi.org/10.1134/S1063783413090138

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