Abstract
BY phase work on the system ammonium nitrate–potassium nitrate–water, Janëcke1,2 showed that below 23° C. two types of solid solution can exist: potassium nitrate dissolved in ammonium nitrate (form III) and ammonium nitrate in potassium nitrate (form II). At higher temperatures there is an increasing amount of another phase which is of a different crystalline form from any of the normal modifications of the two salts. Janëcke suggests that this phase is a solid solution of ammonium nitrate in a metastable form of potassium nitrate, which is only formed on cooling, in the temperature-range 128°–115° C.
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References
Janëcke, E., Z. Angew. Chem., 41, 916 (1928).
Janëcke, E., Z. Anorg. Allg. Chem., 206, 357 (1932).
Kracek, F., Barth, T., and Ksanda, C., Phys. Rev., 40, 1034 (1932).
Barth, T., Z. physikal. Chem., B, 43, 448 (1939).
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COATES, R., CREWE, J. Solid Solutions in the System Ammonium Nitrate–Potassium Nitrate. Nature 190, 1190–1191 (1961). https://doi.org/10.1038/1901190a0
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DOI: https://doi.org/10.1038/1901190a0
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