Depending upon the shape of the unit cells, the grouping of the crystals is done in seven systems known as crystallographic systems.
|
Type |
Lattice Constants | Example |
| Cubic | a=b=c | Ag, Li, Nacl |
| Orthorhombic | a!=b!=c | HgCl2 |
| Monoclinic | a!=b!=c | KClO3 |
| Triclinic | a!=b!=c | K2Cr2O7 |
| Hexagonal | a=b!=c | Quartz, Zn |
| Rhombohedral | a=b=c | Caco3 |
| Tetragonal | a=b!=c | White tin |