Abstract
THE crystals which comprise the alum series have generally been considered to be isomorphous on account of the similarity of their chemical formulæ and of their crystal classes. The more direct evidence of X-ray diffraction shows, however, that there are at least three different structures involved. It is proposed to call these the p and structures, in order of their discovery.
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References
Lipson and Beevers, Proc. Roy. Soc., A, 148, 664; 1935.
Lipson, Phil. Mag. (in the press).
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LIPSON, H. Existence of Three Alum Structures. Nature 135, 912 (1935). https://doi.org/10.1038/135912b0
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DOI: https://doi.org/10.1038/135912b0
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