Electrostatic effects due to periodic-boundary conditions. A few of the most common approaches to remove artifacts due to periodic boundary conditions in aperiodic or partially periodic systems have been implemented in the Environ library. In particular, the Makov-Payne, Martyna-Tuckerman, and Point-Countercharge correction schemes have been implemented for systems in vacuum and in combination with the continuum dielectric environment (Andreussi 2014).