First-principles studies were made of the divacancy, and it was demonstrated that an experimental spin-density localization could be explained in terms of 1-electron images which arose from opposing distortions.

The Divacancy in Silicon and Diamond. B.J.Coomer, A.Resende, J.P.Goss, R.Jones, S.Oberg, P.R.Briddon: Physica B, 1999, 273-274, 520-3