False-colour scanning electron micrograph (SEM) of crystals of vitamin C (ascorbic acid). Vitamin C has a monoclinic crystal structure, characterised by three unequal axes, one pair of which are not at right angles. Magnification: x15 at 35mm size. Blue tint. Original is BW A612/01M. Reference: MICROCOSMOS, figure 7.18, page 136.
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