CCP Full Form
What is the full form of CCP?
This term is used to specify the arrangement of atoms in a crystal lattice. The term CCP means Cubic Closed packed. As the name suggests, this type of arrangement of a cubic crystal lattice is an arrangement of atoms in a cubic arrangement. CCP has the densest possible packing of atoms. Atoms in a CCP arrangement are present at the centre of each face of a cube and on every vertex of the cube, consisting of a total of 14 atoms.
This type of arrangement of atoms is also known as face-centred cubic because of the presence of an atom at the centre of each face of the cube. The side of the cube is 4 times the radius of the atom inside the cube. CCP structure consists of 14 atoms per cubic lattice and is known to be the densest cubic lattice. CCP lattices are stronger than others due to more density of the atoms. Gold, Aluminium and copper are some examples of CCP structure.
Facts
It’s the highest dense arrangement of atoms in a cubic crystal lattice.
Cube contains 14 spheres of atoms in total.
Packing density of this arrangement is 74.04%.
Spheres present at the cube's vertex only contribute 1/4 of its volume to the cube.
Spheres at the centre of the face of the cube contribute 1/2 of its volume to the cube.
Side of the square is 4x the radius of the atom.
Gold, Aluminium and copper are some examples of CCP structure.
Other arrangements of a crystal lattice.
Simple cubic
Body-centred
Face-centered
Hexagonal close-packed.
Frequently Asked Questions (FAQs)
Yes CCP and FCC are the same arrangements of the crystal lattice in cubic arrangement.
CCP structure has the highest packing density/efficiency.
Volume of lattice=1 48Volume of atom at the vertex+126Volume of atom at the face of the cube
\begin{array}{l}
=\frac{1}{4}\left \{ 8\times\left\(\frac{4\Pi}{3}r^{3}\right )\right \}+\frac{1}{2}\left \{6\times\left\(\frac{4\Pi}{3}r^{3}\right )\right\}\\
=\frac{16\Pi}{3}r^{3}
\end{array}
14 atoms.
CCP have atoms at the centre of each face but BCC has an atom at the centre of the cube not at the faces.