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- Title
Manifestation of nitrogen interstitials in synthetic diamonds obtained using a temperature gradient technique (Fe-Ni-C system).
- Authors
Babich, Yu.; Feigelson, B.; Chepurov, A.
- Abstract
The IR-peak 1450 cm (H1a-center) associated with nitrogen interstitials have been studied in nitrogen-bearing diamonds synthesized at high P-T parameters in the Fe-Ni-C system. FTIR study shows that manifestation of this nitrogen form is restricted to the regions of active transformation of C-defects into A-defects, which confirms the connection of its formation with C => A aggregation process. An examination of the dependence of the 1450 cm peak on the degree of nitrogen aggregation indicates that H1a-centers are not only formed during C/A aggregation but also disappear simultaneously with the end of C => A transformation. Established facts suggest direct involving of nitrogen as interstitials in the C => A aggregation and serve as strong experimental argument in support of the 'interstitial' mechanism of nitrogen migration during aggregation in diamonds containing transition metals.
- Subjects
INTERSTITIAL defects; NITROGEN; ARTIFICIAL diamonds; TRANSITION metals; DIAMOND surfaces; TEMPERATURE lapse rate
- Publication
Geochemistry International, 2016, Vol 54, Issue 10, p922
- ISSN
0016-7029
- Publication type
Article
- DOI
10.1134/S0016702916100025