Atomic Properties
- Atomic Number
- 68
- Atomic Mass
- 167.2600 u
- Electron Configuration
- [Xe] 4f12 6s2
- Electronegativity
- 1.24
- Block
- f-block
- Group
- —
- Period
- 6
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 1802.00 K
- Boiling Point
- 3141.00 K
- Density
- 9.0660 g/cm³
About Erbium
Pink-colored compounds; used in fiber optic amplifiers and lasers.
Isotopes of Erbium
Erbium has 6 naturally occurring isotopes.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 162Er | 162 | 161.9287884 | 0.1390% | Stable |
| 164Er | 164 | 163.9292088 | 1.601% | Stable |
| 166Er | 166 | 165.9302995 | 33.50% | Stable |
| 167Er | 167 | 166.9320546 | 22.87% | Stable |
| 168Er | 168 | 167.9323767 | 26.98% | Stable |
| 170Er | 170 | 169.9354702 | 14.91% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)