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What are the three common crystal structures found in metals?
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metallurgy
A zinc-lead blast furnace and lead-splash condenser. This technology is utilized mainly for producing zinc while managing both lead and zinc from raw materials, a technique that was highly influential in 20th-century smelting.
In metallurgy and materials science, the atoms in metals are typically arranged in one of three primary crystal structures, which contribute to their characteristic properties such as ductility and strength. These structures are:1
- Face-centred cubic (fcc): A cubic symmetry where atoms are located at the corners and the centre of each face of the cube. Metals with this structure include copper, gold, and silver.12
- Hexagonal close-packed (hcp): A structure with hexagonal symmetry formed by stacking close-packed atomic planes in an alternating sequence. Examples include magnesium, zinc, and cadmium.21
- Body-centred cubic (bcc): A cubic arrangement featuring atoms at the corners and a single atom at the centre of the cube. This structure is found in metals such as chromium and tungsten.21
Some metals exhibit allotropy, meaning they can transition between these different crystal structures depending on temperature, which allows for significant modification of their mechanical properties through heat treatment.1