At room temperature Chromium has a bcc (body-centered-cubic) crystal structure with a basis of one Cr atom. The unit cell is illustrated. E = 248 GPa.
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Why are rubies red and emeralds green? Their colors come from the same metal in their atomic structureBeryl's crystal structure is more complicated than ... rubies and emeralds come from the presence of very small amounts of chromium. The chromium replaces about 1% of the aluminum in the corundum ...
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