Properties of arsenic in molten potassium tetrachlorogallate at 300°C: Formation of gallium arsenide

Abstract Redox properties of As(III) species have been studied in molten KGaCl 4 . The plot of equilibrium potential of As vs acidity is interpreted in terms of reaction AsCl 4 − + 3 e = As + 4 Cl − . X-Ray analysis of electrodeposits shows that only As is formed under potentiostatic conditions. Conversely, gallium arsenide is observed under galvanostatic conditions, for which the electrode potential becomes very negative.