BCC stands for Body Centred Cubic. It is a type of atomic arrangement and is a relatively "loosely" packed structure (atomic packing factor = 0.68). BCC can be formally termed a cubic lattice with the centre position fully equivalent to each of the eight corners.
Body Centred Cubic structures are, as the name implies, based around a central atom with an atom at each of the corners of an imaginary cube
Associated terms: Face Centred Cubic
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