A marked difference between the Be and C distributions in this material was noted after Zn diffusion. It was shown that grown-in C was stable, and remained localized even after Zn diffusion. On the other hand, Be diffused very rapidly in the presence of diffusing Zn. This effect was attributed to differences in the crystal lattice sites which the dopant occupied.

E.Tokumitsu, T.H.Chiu, H.S.Luftman, N.T.Ha: Journal of Applied Physics, 1991, 69[12], 8426-8