Applied Magnetic Resonance

, 28:355

EPR studies on the di-nitrogen centers with nonequivalent atoms in a reddish-brown plastically deformed diamond


DOI: 10.1007/BF03166767

Cite this article as:
Mineeva, R.M. & Speransky, A.V. Appl. Magn. Reson. (2005) 28: 355. doi:10.1007/BF03166767


Two new di-nitrogen centers, which were labeled M2 and M3, were found together with known W7 and N4 centers in an unusual reddish-brown natural diamond. The following magnetic hyperfine interaction parameters (expressed in MHz) were determined for the two nitrogen atoms:A1(1)=117.95(5),A1(2)=A1(3)=84.48(5),A2(1)=7.1(1),A2(2)=A2(3)=6.6(1) for M2 andA1(1)=121.55(5),A1(2)=A1(3)=85.90(5),A2(1)=6.0(1),A2(2)=5.4(1),A2(3)=5.1(1) for M3. Hyperfine interaction tensors for the nitrogen atom N1 with a larger interaction have axial symmetry about the <111> direction, but those for the other nitrogen atom, N2, appear to be small, almost isotropic. Probable models of the M2 and M3 centers are suggested and discussed.

Copyright information

© Springer 2005

Authors and Affiliations

  1. 1.Institute of Geology of Ore Deposits, Petrography, Mineralogy and GeochemistryRussian Academy of SciencesMoscowRussian Federation