Abstract
Diamond crystals synthesized in Mg–EuF2–C and Mg–EuF3–C systems using high PT (pressure-temperature) parameters are studied by electron paramagnetic resonance (EPR) and photoluminescence spectroscopy. The luminescence spectra of diamond crystals grown in europium containing systems have an optical center with a zero phonon line at λ = 607 nm. The EPR spectrum of the diamond crystal grown in the Mg–EuF3–C system has a new paramagnetic center with hyperfine structure from a fluorine atom. This EPR spectrum is due to a C3ν (or D3d) point symmetry center and is observed at low temperatures (T < 77 K). Various possible structures for the C3ν symmetry centers containing the Eu–F fragment are considered.
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Funding
The reported study was funded by RFBR (project number 18-29-12041) and by the State Assignment for the Institute of Geology and Mineralogy, Siberian Branch, Russian Academy of Sciences and the Ministry of Science and Higher Education of the Russian Federation (project No. 12 1031700313-8).
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Russian Text © The Author(s), 2021, published in Zhurnal Strukturnoi Khimii, 2021, Vol. 62, No. 11, pp. 1870-1877.https://doi.org/10.26902/JSC_id83824
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Nadolinny, V.A., Komarovskikh, A.Y., Borzdov, Y.M. et al. EPR STUDY OF DIAMOND CRYSTALS SYNTHESISED IN Mg–EuF2–C AND Mg–EuF3–C SYSTEMS AT HIGH PT PARAMETERS. J Struct Chem 62, 1759–1766 (2021). https://doi.org/10.1134/S0022476621110123
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DOI: https://doi.org/10.1134/S0022476621110123