Denoting a crystal structure in which there is an atom at each vertex and at the centre of the unit cell.
- Martensite is a supersaturated solid solution of carbon in iron which has a body-centred tetragonal structure, a distorted form of bcc iron.
- Heat-treatment of steel involves the change of austenite, a face-centred cubic iron lattice containing carbon atoms in the interstices, into a body-centred cubic ferrite with a low solubility for carbon.
- Under ordinary laboratory conditions iron has a body-centred cubic structure (the alpha phase), but this is stable only at low pressures and is not relevant to the core.
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