The Copper Crystal

•A “face-centered” cube with an atom at each corner and an atom at the center of each face.

Crystals Can Grow to Large Size
•Atoms are added to the basic lattice
•Straight lines within the crystal are called slip-planes
•Viewed from the side the pattern is very regular

•Large crystals have long slip-planes
Distortion can occur along the slip-planes.
The copper would be softer if tested
If slip-planes are shorter, there’s less distortion. The copper would test harder