44.3 MB (3.1 MB compressed)
4555 x 3403 pixels
38.6 x 28.7 cm ⏐ 15.2 x 11.3 in (300dpi)
DR. JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR. JEREMY BURGESS / SCIENCE PHOTO LIBRARY
Common salt. Scanning electron micrograph (SEM) of BDH Analar sodium chloride recrystallised from distilled water. The crystal is built up from a cubic lattice of sodium and chloride ions. In the absence of impurities the exact crystal form (cubic) is formed. The micrographs show that in practice this basic cube is most often disrupted by dislocations giving rise to crystals with a wide variety of shapes - all retaining the cubic symmetry. Magnification: X 14 at 35mm size, X 100 at 8x10-inch size.
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