The 1-dimensional Poisson equation for intrinsic defects in ionic crystals was solved for the case where the characteristic crystal dimension was approximately equal to the Debye length. Expressions were derived for the potential at the center of a crystal, and for the conduction activation energy as a function of the micro-crystal size. The surface potential, and the potential at the center of octahedral and cubic AgBr crystals, were estimated.

A.V.Khaneft, V.G.Kriger: Fizika Tverdogo Tela, 1996, 38[4], 977-82 (Physics of the Solid State, 1996, 38[4], 543-6)