Email this article Behaviour of Trace Elements at Shock Transformation of Zircon to Reidite
- Authors: Shiryaev A.A.1, Zhukov A.N.2, Yakushev V.V.2, Averin A.A.1, Yapaskurt V.O.3, Borisova A.Y.4, Bychkov A.Y.3, Safonov O.G.3,5,6, Lomonosov I.V.2
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Affiliations:
- Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
- Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences
- Lomonosov Moscow State University, Faculty of Geology
- Géosciences Environnement Toulouse, GET, Université de Toulouse
- Korzhinskii Institute of Experimental Mineralogy of the Russian Academy of Sciences
- Department of Geology, University of Johannesburg
- Issue: Vol 33, No 5 (2025)
- Pages: 79-93
- Section: Articles
- URL: https://journals.rcsi.science/0869-5903/article/view/354618
- DOI: https://doi.org/10.31857/S0869590325050051
- ID: 354618
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Abstract
Large single crystals of natural zircon were shock-loaded at 13.6 and 51.3 GPa in planar geometry. No structural transformations are observed after the loading at 13.6 GPa. In the experiment at 51.3 GPa zircon transforms to its denser polymorph – reidite, with sheelite-like structure. Investigation of the reidite sample using X-ray diffraction, Raman spectroscopy, photo- and cathodoluminescence revealed segregation of some trace elements cations (such as REE) on planar defects. Importantly, the segregation has occurred in a laboratory-scale experiment without long-term annealing of the sample after the shock loading. Plausible mechanism of segregation of three-valent trace elements implies local violation of charge balance in course of reconstructive transformation of zircon to reidite. As a result of related changes in topology of polyhedra and in second (Si–Zr) coordination sphere, a fraction of trace elements is expelled into energetically expensive interstitial positions with high diffusivities even at low temperatures.
About the authors
A. A. Shiryaev
Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
Email: petrolog@igem.ru
Moscow, Russia
A. N. Zhukov
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences
Email: petrolog@igem.ru
Chernogolovka, Moscow District, Russia
V. V. Yakushev
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences
Email: petrolog@igem.ru
Chernogolovka, Moscow District, Russia
A. A. Averin
Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences
Email: petrolog@igem.ru
Moscow, Russia
V. O. Yapaskurt
Lomonosov Moscow State University, Faculty of Geology
Email: petrolog@igem.ru
Moscow, Russia
A. Yu. Borisova
Géosciences Environnement Toulouse, GET, Université de Toulouse
Email: petrolog@igem.ru
Toulouse, France
A. Yu. Bychkov
Lomonosov Moscow State University, Faculty of Geology
Email: petrolog@igem.ru
Moscow, Russia
O. G. Safonov
Lomonosov Moscow State University, Faculty of Geology; Korzhinskii Institute of Experimental Mineralogy of the Russian Academy of Sciences; Department of Geology, University of Johannesburg
Email: petrolog@igem.ru
Moscow, Russia; Chernogolovka, Moscow District, Russia; Johannesburg, South Africa
I. V. Lomonosov
Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences
Author for correspondence.
Email: petrolog@igem.ru
Chernogolovka, Moscow District, Russia
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