Abstract
THAT the statement of the “law of isomorphism” given by Mitscherlich is not applicable to all cases of isomorphous salts has been recognised for some time. M. Klein has recently described certain pairs of salts which crystallise in identical forms, but are not of similar chemical composition; thus tungstoboric acid, 9WO3. B2O3. 2H2O, is isomorphous with silico-tungstic acid, 12WO3. SiO2. 4H2O. M. Klein proposes to state the law of isomorphism in the following terms:—“Isomorphous bodies have either similar chemical composition, or exhibit only small differences in percentage composition; they contain either a common group of elements, or groups of elements of identical chemical formation which form by far the greater part of cheir weight” (Compt. Rend. xcv. 781).
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Chemical Notes . Nature 28, 18 (1883). https://doi.org/10.1038/028018a0
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DOI: https://doi.org/10.1038/028018a0