Abstract
MUCH controversy centres around the role of manganese as a colorant of glass. Mellor1 states that manganese colours alkaline glasses pink to violet under oxidizing conditions. According to Thorpe2, the full colour is only developed when manganese is in a fully oxidized condition (Mniv). In Fuwa's3 opinion, the manganic oxide is responsible for the pink colour, and colourless manganese in glasses is bivalent.
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References
Mellor, "A Comprehensive Treatise on Inorganic and Theoretical Chemistry", 6, 523 (1935).
Thorpe, "Dictionary of Applied Chemistry", 2, 721 (1912); 3, 386 (1922).
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Randall, J. T., Trans. Faraday Soc., 35, 12 (1938).
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BHATNAGAR, S. Magnetic Evidence regarding the State of Manganese in Glasses. Nature 143, 599–600 (1939). https://doi.org/10.1038/143599b0
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DOI: https://doi.org/10.1038/143599b0
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