GEOLOGY

Detailed explanation-1: -The simple cubic lattice is the same, except that the atoms are found at the corner of the cubic unit cell. Therefore each atom is shared by 8 unit cells. There are eight eighths (equal to one whole atom) in each unit cell.

Detailed explanation-2: -The simple cubic unit cell is delineated by eight atoms, which mark the actual cube. These are corner atoms, so each one only contributes one eighth of an atom to the unit cell, thus giving us only one net atom.

Detailed explanation-3: -A particle at the corner of a unit cell is shared by eight-unit cells. So, each particle contributes 18 part to the unit cell.

Detailed explanation-4: -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-5: -The face-centred cubic structure (fcc) In this crystal structure there are the eight lattice points at each corner, as in the simple cubic, but there are additional lattice point at the centre of each face of the cube.