T5 - cFaceCenteredCubic(FCC) There are atoms at the corners...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon
Crystal Structure 1 c- Face Centered Cubic (FCC) There are atoms at the corners of the unit cell and at the center of each face. Face centered cubic has 4 atoms so its non primitive cell. Many of common metals (Cu,Ni,Pb. .etc) crystallize in FCC structure.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Crystal Structure 2 4 (0,353a) FCC 0,74 Atomic Packing Factor of FCC
Background image of page 2
Crystal Structure 3 Atoms Shared Between: Each atom counts: corner 8 cells 1/8 face centre 2 cells 1/2 body centre 1 cell 1 edge centre 2 cells 1/2 lattice type cell contents P 1 [=8 x 1/8] I 2 [=(8 x 1/8) + (1 x 1)] F 4 [=(8 x 1/8) + (6 x 1/2)] C 2 [=(8 x 1/8) + (2 x 1/2)] Unit cell contents Counting the number of atoms within the unit cell
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Crystal Structure 4 Example; Atomic Packing Factor
Background image of page 4
Crystal Structure 5 2 - HEXAGONAL SYSTEM A crystal system in which three equal coplanar axes intersect at an angle of 60 , and a perpendicular to the others, is of a different length.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Crystal Structure 6 2 - HEXAGONAL SYSTEM Atoms are all same.
Background image of page 6
Crystal Structure 7
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 8
This is the end of the preview. Sign up to access the rest of the document.

This document was uploaded on 02/10/2010.

Page1 / 15

T5 - cFaceCenteredCubic(FCC) There are atoms at the corners...

This preview shows document pages 1 - 8. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online