Electron spin resonance of a tri-nitrogen centre in Cape yellow type Ia diamonds

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, , Citation J H N Loubser et al 1982 J. Phys. C: Solid State Phys. 15 6031 DOI 10.1088/0022-3719/15/29/014

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1 Dept. of Phys., Univ. of the Witwatersrand, Johannesburg, South Africa

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0022-3719/15/29/6031

Abstract

The ESR spectra of a cluster of three nitrogens observed in natural Cape yellow diamonds are interpreted. The ESR results show that the nitrogens lie in (110) planes. The spin Hamiltonian parameters are given and a model is proposed in which the nitrogens occupy substitutional sites with the paramagnetic electron occupying a pi -orbital in the plane of the nitrogens.

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