Abstract
IN a recent communication1, the structure of the molecule of 12-phosphotungstic acid was described. The formula of the acid was found to be H3PW12O40.nH2O. This structure was worked out from powder photographs of the partially dehydrated acid, containing 6 or 7 molecules of water per molecule of acid, which is obtained by drying the more highly hydrated crystals to constant weight over P2O5 in vacuo.
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References
NATURE, 131, 908, June 24, 1933.
J. L. Hoard, Z. Krist., 84, 217; 1933.
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KEGGIN, J. Structure of the Crystals of 12-Phosphotungstic Acid. Nature 132, 351 (1933). https://doi.org/10.1038/132351a0
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DOI: https://doi.org/10.1038/132351a0
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