50.4 MB (3.4 MB compressed)
3621 x 4869 pixels
30.7 x 41.1 cm ⏐ 12.1 x 16.2 in (300dpi)
DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY DR JEREMY BURGESS / SCIENCE PHOTO LIBRARY
Scanning electron micrograph (SEM) of pure salt, or BDH Analar sodium chloride, recrystallised from distilled water. The crystal is built up from a cubic lattice of sodium & chloride ions. In the absence of impurities, an exact cubic crystal is formed. This micrograph shows that in practice the basic cube is often disrupted by dislocations, giving rise to crystals with a wide variety of shapes although they retain the underlying cubic symmetry. Magnification: x15 at 35mm size, x100 at 8x10-inch size.
Model release not required. Property release not required.