GENERAL GEOLOGY

Detailed explanation-1: -Since an atom at a corner of a simple cubic unit cell is contained by a total of eight unit cells, only one-eighth of that atom is within a specific unit cell. And since each simple cubic unit cell has one atom at each of its eight “corners, ” there is 8×18=1 atom within one simple cubic unit cell.

Detailed explanation-2: -The corners contribute only one net atom and the center atom contributes another for a total of two net atoms. Please, notice that the corner atoms are not touching one another. Instead, the atoms touch through the center atom along the diagonal of the cube.

Detailed explanation-3: -(i) An atom located at the corner of a cubic unit cell is shared by eight adjacent unit cells. Therefore, 1/8th portion of the atom is shared by one unit cell. (ii) An atom located at the body centre of a cubic unit cell is not shared by its neighbouring unit cell.

Detailed explanation-4: -The simple cubic structure (sc) In the simple cubic structure there is only one lattice point at each corner of the cube-shaped unit cell. They mark the position of either a single atom, or the same group of atoms, known as the motif, which is repeated across the lattice.

Detailed explanation-5: -A simple cubic cell has an atom at each corner of a cube for a total of 8 atoms.