File(s) under permanent embargo
Study of local concentration of single substitutional nitrogen atoms in microdiamonds from the Kokchetav massif
journal contribution
posted on 2023-05-18, 04:20 authored by Nadolinny, VA, Shatsky, VS, Kozmenko, OA, Stepanov, AS, Palyanov, YN, Kupriyanov, INIn this communication we present an estimation of the concentration of single substitutional nitrogen atoms (P1 centre) from EPR data in Kokchetav diamonds. We first performed an analysis of local P1 centre concentrations using van Wyk’s treatment (van Wyk et al., 1997) of the line width of the resolved EPR spectrum. Also by analysing the dependence of the line-width of the broad exchange line on the P1 concentration in range higher than 1000 ppm in synthetic diamonds, we obtained a calibration curve allowing the estimation of the local P1 centre concentration higher than 1000 ppm and the local volumes occupied by substitutional nitrogen atoms without taking measurements of microcrystalline volume. In addition to the development of a method for calculating high local nitrogen concentrations, the aggregation process in P,T-treated Kokchetav diamonds has been given considerable attention and it was shown that the rate of nitrogen aggregation in these diamonds is consistent with data given in Evans (Evans & Qi, 1982).
History
Publication title
European Journal of MineralogyVolume
18Issue
6Pagination
739-743ISSN
0935-1221Department/School
School of Natural SciencesPublisher
E Schweizerbartsche VerlagsPlace of publication
Naegele U Obermiller Johannesstrasse 3A, Stuttgart, Germany, D 70176Rights statement
Copyright 2006 Schweizerbart science publishersRepository Status
- Restricted