GEOLOGY

Detailed explanation-1: -Hexagonal close-packed lattice has the highest packing efficiency of 74%. The packing efficiencies of simple cubic and body-centred cubic lattices are 52.4% and 68% respectively. Was this answer helpful?

Detailed explanation-2: -Hexagonal close-packed and face-centered cubic structures have maximum packing factor and are more able to resist deformation.

Detailed explanation-3: -The atomic packing factor tells about many properties of the materials. As its value is more it indicates more closeness of atoms with each other or less empty space available in the lattice. For FCC crystals the atomic factor is 74 percent and for BCC it is 68 percent.

Detailed explanation-4: -The face centered unit cell (FCC) contains atoms at all the corners of the crystal lattice and at the center of all the faces of the cube. The atom present at the face centered is shared between 2 adjacent unit cells and only 1/2 of each atom belongs to an individual cell. The packing efficiency of FCC lattice is 74%.

Detailed explanation-5: -Hexagonal close packed lattice. Body centred cubic lattice. Face centred cubic lattice. Both (a) and (c) 22-Nov-2022