Abstract
IN order to prepare aluminium chloride for atomic weight determination, I burnt pure aluminium metal in a current of pure dry chlorine. Before starting the reaction, pure dry nitrogen was passed through the apparatus to expel the air. After this has been attained, the flow of nitrogen was stopped and a slow current of pure dry chlorine was allowed to pass over the metal. Since the pure dry gas reacts very slowly with aluminium at ordinary room temperature, the tube containing aluminium was heated to about 500° C. After the completion of the reaction, the aluminium chloride formed and a quantity of uncombined metal was cooled in a very slow stream of nitrogen. As the red heat ceased, a bright green phosphorescence appeared in the reaction tube surrounding small pieces of corroded uncombined metal.
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KREPELKA, H. Phosphorescence caused by Active Nitrogen. Nature 112, 134 (1923). https://doi.org/10.1038/112134c0
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DOI: https://doi.org/10.1038/112134c0
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