Physics and Chemistry of Minerals

, Volume 42, Issue 9, pp 707–722

The characteristic photoluminescence and EPR features of superdeep diamonds (São-Luis, Brazil)

  • Olga P. Yuryeva
  • Mariana I. Rakhmanova
  • Vladimir A. Nadolinny
  • Dmitry A. Zedgenizov
  • Vladislav S. Shatsky
  • Hiroyuki Kagi
  • Andrey Yu. Komarovskikh
Original Paper

DOI: 10.1007/s00269-015-0756-7

Cite this article as:
Yuryeva, O.P., Rakhmanova, M.I., Nadolinny, V.A. et al. Phys Chem Minerals (2015) 42: 707. doi:10.1007/s00269-015-0756-7

Abstract

Photoluminescence (PL) spectroscopy and electron paramagnetic resonance (EPR) were used for the first time to characterize properties of superdeep diamonds from the São-Luis alluvial deposits (Brazil). The infrared measurements showed the low nitrogen content (>50 of 87 diamonds from this locality were nitrogen free and belonged to type IIa) and simultaneously the extremely high level of nitrogen aggregation (pure type IaB being predominant), which indicates that diamonds under study might have formed under high pressure and temperature conditions. In most cases, PL features excited at various wavelengths (313, 473, and 532 nm) were indicative of different growth and post-growth processes during which PL centers could be formed via interaction between vacancies and nitrogen atoms. The overall presence of the 490.7 nm, H3, and H4 centers in the luminescence spectra attests to strong plastic deformations in these diamonds. The neutral vacancy known as the GR1 center has probably occurred in a number of crystals due to radiation damage in the post-growth period. The 558.5 nm PL center is found to be one of the most common defects in type IIa samples which is accompanied by the EPR center with g-factor of 2.00285. The 536 and 576 nm vibronic systems totally dominated the PL spectra of superdeep diamonds, while none of “normal” diamonds from the Mir pipe (Yakutia) with similar nitrogen characteristics showed the latter three PL centers.

Keywords

Superdeep diamond Photoluminescence (PL) spectroscopy EPR Electron irradiation Annealing 

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Olga P. Yuryeva
    • 1
  • Mariana I. Rakhmanova
    • 1
  • Vladimir A. Nadolinny
    • 1
  • Dmitry A. Zedgenizov
    • 2
    • 3
  • Vladislav S. Shatsky
    • 2
    • 3
    • 4
  • Hiroyuki Kagi
    • 5
  • Andrey Yu. Komarovskikh
    • 1
  1. 1.Nikolaev Institute of Inorganic Chemistry SB RASNovosibirskRussia
  2. 2.V.S. Sobolev Institute of Geology and Mineralogy SB RASNovosibirskRussia
  3. 3.Novosibirsk State UniversityNovosibirskRussia
  4. 4.A.P. Vinogradov Institute of Geochemistry SB RASIrkutskRussia
  5. 5.Geochemical Research Center, Graduate School of ScienceUniversity of TokyoTokyoJapan

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