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In a bcc unit cell, there is one atom in the body's center and eight others in each of the cell's eight corners. The unit cell is entirely made up of the atom at the center of the body. Each corner atom contributes one eight to the unit cell. Therefore, 818+1=2 atoms make up the entire number of atoms in the unit cell.
the body-centered cubic is named after the central atom. However, there are eight corners, each of which has a shared atom with seven unit cells nearby. As a result, each corner of the unit cell contains 1/8 of an atom, which adds up to 1 whole atom.
A unit cell is the smallest repeating arrangement of atoms found in a crystal. The body-centered cubic (BCC) unit cell, a third typical metal packing arrangement, includes one atom in the cube's core in addition to atoms at each of its eight corners. The corner atoms in each unit cell will be divided among eight unit cells because each corner atom is the corner of another cube. The central atom and the eight eighths from the corners make up the BCC unit cell's total of two atoms.
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