2001 Ab initio Cluster Calculations of the Electric Field Gradients at the Nb Site in the LiNbO3 Crystal

M.G. Shelyapina, V.S. Kasperovich, B.F. Shchegolev, E.V. Charnaya

Physica status solidi (b) 225 (2001) 171-177

http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1521-3951(200105)225:1%3C171::AID-PSSB171%3E3.0.CO;2-0/abstract