(above) tungsten atoms arranged in a body centred cubic pattern
Tungsten (or Wolfram): this graphic shows metal atoms arranged in a body centred cubic arrangement. Tungsten is very hard and has an extremely high melting point (carbon is higher). It can be alloyed with iron to form a steel and combined with carbon to make tungsten carbide.
Image is 500 pixels across, the originals are 4096 pixels across.
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