The document discusses the face centered cubic (FCC) crystal structure. It describes how in an FCC structure, atoms are arranged at the corners and center of each face of the cubic unit cell, totaling 14 atoms per cell. Atoms in FCC have a coordination number of 12 and high atomic packing factor due to dense packing. Common metals that adopt the FCC structure include aluminum, copper, nickel, iron, gold and silver.

1. Face Centered Cubic
(FCC)Structure
• DEPARTMENT OF PHYSICS
• UNIVERSITY OF SAHIWAL ; SAHIWAL

2. Presented By:
Name Muhammad Hanan
Roll No. Bs-phy-E-03
Session 2020-24

3. Contents
 Crystal Structure
 Face Centered Cubic
 Representation of FCC
 Co-ordination Number
 Atomic Packing Factor
 Characteristics of FCC
 Example of FCC

4. Crystal Structure
 Face Centred Cubic Structure
 Body Centred Cubic Structure
 Hexagonal Closed-packed Structure

5. Face Centered Cubic Structure
 The face centered cubic arrangements
has fourteen(14) atoms
 The atom are arranged at the corners
and center of each face of the cell

6. Face Centered Cubic Structure
 Atoms are assumed to touch along
face diagonals

7. Representation of FCC
2-Dimenssional 3-Dimenssional

8. Representation of FCC in 3D

9. Coordination No:
Coordination No.=12
(#nearest neighbours)

10. Atomic packing factor(APF)
It can be defined as the ratio between
the volume of the basic atoms of the
unit cell (which represent the volume
of all atoms in one unit cell ) to the
volume of the unit cell it self.

11. Atomic packing factor(APF)

12. Characteristics of FCC
 They are plastic and malleable.
 It,s stronger and denser than BCC.
 Atoms are arranged at the corners and center of each cube face of the cell.

13. Examples
Metals with the FCC Structured include
 Aluminum
 copper
 nickel
 iron,
 gold
 silver