Abstract
Abstract Artisanal gold mining amalgams from the Munhena mine in Manica province, Mozambique were burned under laboratory conditions to determine the ratio of mercury to sponge gold. When compared to established phase diagrams of the mercury–gold alloy, the results indicate that all miners actually form a mixture of amalgam and excess mercury. The variability in mass percentage of mercury in each artisanal amalgam is indicative of the techniques used by individual miners to form their amalgam. Removal of excess mercury prior to the burning process will greatly reduce the amount of mercury evolved during the mining process.
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