
Erbium (Er) is a chemical element of the periodic table, located in the period 6, and has the atomic number 68. It is the twelfth element in the lanthanide series. It is a soft, malleable, lustrous, silvery-white metal, which is named after Ytterby, a village in Sweden, where it was mined. It is never found freely in nature and is counted as one of the rare earth elements.
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– f block |
FAQs on Erbium Element
Erbium |
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‣ What does erbium look like? Appearance: silvery white |
‣ When was the element erbium discovered and by who? Discovery: Carl Gustaf Mosander (1843) |
‣ Where is erbium found on the periodic table?![]() Location: Erbium is found in the sixth row of the periodic table, next to the holmium element. |
‣ What’s the atomic mass number for erbium? Atomic number (Z): 68 |
‣ What’s the symbol for erbium? Symbol: Er |
‣ Erbium atomic weight: 167.259 |
‣ Which block does erbium belong to? Block: f-block |
‣ What period is erbium on the periodic table? Period: 6 |
‣ Erbium atomic radius: empirical: 176 pm |
‣ Erbium covalent radius: 189±6 pm |
‣ Erbium melting point: 1802 K (1529 °C, 2784 °F) |
‣ What is the boiling point for erbium? Boiling point: 3141 K (2868 °C, 5194 °F) |
‣ Electrons per shell of erbium: 2, 8, 18, 30, 8, 2 |
‣ What is the ground state electron configuration for erbium? Electron configuration: [Xe] 4f12 6s2 |
‣ Erbium ionization energies: 1st: 589.3 kJ/mol 2nd: 1150 kJ/mol 3rd: 2194 kJ/mol |
‣ What is the phase of erbium? Phase (at r.t): solid |
‣ What is the density of erbium? Density (near r.t): 9.066 g/cm3 when liquid (at m.p): 8.86 g/cm3 |
‣ Erbium magnetic ordering: paramagnetic at 300 K |
‣ Erbium natural occurrence: primordial |
‣ Erbium oxidation state: +3 |
‣ What is the ground state electron configuration for erbium? Electronegativity: Pauling scale: 1.24 |
‣ Erbium poisson’s ratio: 0.237 |
‣ Erbium heat of fusion: 19.90 kJ/mol |
‣ Erbium heat of vaporization: 280 kJ/mol |
‣ Erbium molar heat capacity: 28.12 J/(mol K) |
‣ Erbium molar magnetic susceptibility: +44300.00 × 10-6 cm3/mol |
‣ Speed of sound in erbium: 2830 m/s (at 20 °C) |
‣ What is the crystal structure of erbium? Crystal structure: hexagonal close-packed (hcp) |
‣ Thermal expansion of erbium: poly: 12.2 µm/(m.K) (r.t) |
‣ Thermal conductivity of erbium: 14.5 W/(m.K) |
‣ Erbium electrical resistivity: poly: 0.860 µΩ.m (at r.t) |
‣ Erbium hardness Vickers hardness: 430-700 MPa Brinell hardness: 700-1070 MPa |
‣ Young’s modulus of erbium: 69.9 GPa |
‣ Shear modulus of erbium: 28.3 GPa |
‣ Bulk modulus of erbium: 44.4 GPa |
‣ Erbium CAS number: 7440-52-0 |
‣ Erbium vapor pressure
Vapor pressure | ||||||
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P (Pa) | 1 | 10 | 100 | 1 k | 10 k | 100 k |
at T (K) | 1504 | 1663 | (1885) | (2163) | (2552) | (3132) |
‣ How many erbium isotopes are there?
Main isotopes of erbium | ||||
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Isotope | Abundance | Half-life (t1/2) | Decay mode | Product |
160Er | syn | 28.58 h | ε | 160Ho |
162Er | 0.139 % | stable | ||
164Er | 1.601 % | 10.36 h | stable | |
165Er | syn | ε | 165Ho | |
166Er | 33.503 % | stable | ||
167Er | 22.869 % | stable | ||
168Er | 26.978 % | stable | ||
169Er | syn | 9.4 d | β– | 169Tm |
170Er | 14.910 % | stable | ||
171Er | syn | 7.516 h | β– | 171Tm |
172Er | syn | 49.3 h | β– | 172Tm |
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