1. Crystal structure of Diamond
Diamond structure is like a face-centered cubic(FCC) lattice. Each carbon atom joins four other carbon atoms in regular tetrahedrons. A tetrahedron has four faces and six edges. It is like an Egyptian pyramid in which the base is a triangle instead of a square.

2. Diamond structure Imagine a face-centered cubic lattice!
Diamond is composed of pure carbon.

3. Diamond structure view the cube from a green arrow along the diagonal
a diagonal passing through the center of a cube

4. Diamond structure This is the cubic lattice viewed from a green arrow.1 2 3
This is the cubic lattice viewed from a green arrow. 1 2 3
In a diamond structure,
a carbon exists at the center of a regular tetrahedron consisted of a and three

5. Diamond structure 1 2 3 1 2 3

6. Diamond structure 1 2 3 1 2 3

7. Diamond structure 1 2 3 1 2 3

8. Diamond structure 1 2 3 3 2 1

9. Diamond structure 1 2 3

10. Diamond structure 1 2 3
This structure shows one unit cell of the diamond structure.
The diamond structure can be viewed as a face-centered cubic array with half of the tetrahedral holes filled.