Abstract
IN the chemical literature it is customary for crystalline substances to be characterized as forming needles or plates. It is interesting to note that this concept of acicularity can be given a precise quantitative meaning and applied to any regular solid figure of which the three principal dimensions are known, and may be extended to cover the general form of irregular figures. In the present instance, rectangular solids are considered for the sake of simplicity, and the three dimensions denoted as a, b, c, where a ≥ b≥c.
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WHITTAKER, E. Particle Shape. Nature 155, 331–332 (1945). https://doi.org/10.1038/155331a0
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DOI: https://doi.org/10.1038/155331a0
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