Abstract
EVERY chemist is familiar with the well-developed crystals bounded by plane faces which are formed by chemical substances. That the angles between these faces are characteristic of the substance and can be measured accurately by the reflecting goniometer is also common knowledge.
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PORTER, M., SPILLER, R. Crystallo-Chemical Analysis: The Barker Index at Oxford. Nature 144, 298–299 (1939). https://doi.org/10.1038/144298a0
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DOI: https://doi.org/10.1038/144298a0
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