This study also illustrates how the defect chemistry and doping response of solid electrolytes may be more complex than implied by simple mass-and chargecompensating defect formation schemes, and demonstrates how a more complete description that accounts for varying synthesis conditions and thermodynamic competition between defect species can be found by considering a full set of defects within a self-consistent thermodynamic model. Finally, our results show how the defect chemistry and doping response of Li 3 OCl can be understood as a consequence of "Schottky-disorder", with quantitatively similar behaviour therefore predicted for other Schottky-disordered solid electrolytes, including other antiperovskite and structurally-related materials.