Answer: One example of a body-centered crystal is iron, which has a BCC (body-centered cubic) crystal structure. In a BCC structure, the atoms are arranged in a cube with one atom in the center of the cube and eight atoms at the corners. In this diagram, the circles represent iron atoms. The large circle at the center of the cube is an iron atom that is shared by eight adjacent unit cells. The smaller circles at the corners of the cube are individual iron atoms that are not shared by adjacent unit cells. The diagonal of the cube is the body diagonal, which passes through the center of the cube and connects opposite corners.
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