Metals
Packing of Simple Spheres - Metallic Solids
| PACKING PROPERTIES |
Simple Cubic SCP |
Body centered BCP |
Hexagonal
closest HCP |
Cubic closest packing CCP (face centered cubic) |
| Layers |
aaa on top of each other |
ab-ab Square layers b sphere in holes a |
ab-ab hex. layer b sphere in holes a |
abc –abc ab as HCP c offset |
| Coord. # |
6 4 in a 1 above 1 below |
8 4 in a above 4 in a below |
12
6 in
a 3 in b below |
12
6 in
a 3 in b below |
| Packing Density | 0.52 | 0.68 | 0.74 | 0.74 |
| Examples | Polonium | Fe, Na, 14 other metals | Zn, Mg, 19 other metals | Ag, Cu, 16 other metals |
| Jmol Links |
SCP 1 Flash Anim Jmol 1 |
BCP 1 Flash Anim Jmol 1 |
Jmol 1 |
CCP (FCC) 1 Flash Anim Jmol 1 |
Additional Links