Crystal structures Flashcards
Lecture 8
1
Q
What are metals?
A
Metals are (poly)crystalline
2
Q
What is (poly)crystalline?
A
This regular structure means metals are crystalline
3
Q
What is closed-packed layer?
A
Most metal atoms want to pack as efficiently as possible
Most efficient packing of sphere in a single layer in hexagonal
4
Q
How does the close packing in 3D for ABCABC?
(aka Face Centred Cubic (FCC) or Cubic Close Packed (CCP))
A
5
Q
How does the close packing in 3D for ABABAB?
(aka Hexagonal Close Packed (HCP))
A
