| Scandium (Sc) | |
| Atomic Number | 21 |
| Atomic Weight | 44.956 |
| Room Temperature Structure | hcp (A3) |
| Experimental Lattice Constant a | 6.26 Bohr |
| Calculated Lattice Constant a | 6.16 Bohr |
| Experimental Lattice Constant c | 9.96 Bohr |
| Calculated Lattice Constant c | 9.28 Bohr |
| Experimental Bulk Modulus | 44 GPa |
| Calculated Bulk Modulus | 63 GPa |
The tight-binding parameters were fit to first-principles Augmented Plane Wave (APW) results over the following ranges:
| Structure | Minimum Range Lattice Constant (Bohr) | Maximum Range Lattice Constant (Bohr) |
| fcc (A1) | 8.29 | 8.69 |
| bcc (A2) | 6.40 | 7.00 |
| Reference | Phys. Rev. B 54, 4519-30 (1996) | |
Use of the parameters outside of these ranges may result in unphysical behavior.