erbium

erbium (chemical element)

Periodic table location

Image

atomic symbol | Er atomic number | 68 short electronic configuration | [Xe]6s^24f^12 Aufbau diagram | 4f 6s block | f period | 6 atomic mass | 167.259 u (unified atomic mass units)

phase at STP | solid melting point | 1497 °C (rank: 29th) boiling point | 2868 °C (rank: 38th) molar heat of fusion | 19.9 kJ/mol (rank: 21st) molar heat of vaporization | 285 kJ/mol (rank: 45th) specific heat at STP | 168 J/(kg K) (rank: 63rd) Néel point | 82 K (properties at standard conditions)

density | 9.066 g/cm^3 (rank: 32nd) liquid density | 8.86 g/cm^3 molar volume | 18.45 cm^3/mol Mohs hardness | 2 (between gypsum and talc) Vickers hardness | 589 MPa (rank: 26th) Brinell hardness | 814 MPa (rank: 16th) bulk modulus | 44 GPa (rank: 36th) shear modulus | 28 GPa Young's modulus | 70 GPa (rank: 29th) Poisson ratio | 0.24 (rank: 44th) tensile yield strength | 60 MPa (rank: 22nd) ultimate tensile strength | 136 MPa (rank: 24th) sound speed | 2830 m/s (rank: 35th) thermal expansion | 1.22×10^-5 K^(-1) (rank: 28th) thermal conductivity | 15 W/(m K) (rank: 59th) (properties at standard conditions)

electrical type | conductor resistivity | 8.6×10^-7 Ω m (ohm meters) electrical conductivity | 1.2×10^6 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 0.0341788 mass magnetic susceptibility | 3.77×10^-6 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 6.30566×10^-7 m^3/mol (cubic meters per mole) Curie point | 32 K (kelvins) Néel point | 82 K (kelvins) color | (silver)

valence | 3 electronegativity | 1.24 electron affinity | 50 kJ/mol (kilojoules per mole) first ionization energy | 589.3 kJ/mol (kilojoules per mole) ionization energies | 589.3 kJ/mol | 1150 kJ/mol | 2194 kJ/mol | 4120 kJ/mol

Reactivity

term symbol | ^3H_6 atomic radius | 175 pm covalent radius | 189 pm (electronic ground state properties)

(neutral erbium atomic spectrum)

universe abundance | 2×10^-7 mass% (rank: 51st) solar abundance | 1×10^-7 mass% (rank: 57th) meteorite abundance | 1.8×10^-5 mass% (rank: 55th) crust abundance | 3×10^-4 mass% (rank: 44th) ocean abundance | 9×10^-11 mass% (rank: 64th) universe molar abundance | 1×10^-9 mol% (rank: 59th) solar molar abundance | 9.9×10^-10 mol% (rank: 53rd) meteorite molar abundance | 2×10^-6 mol% (rank: 56th) ocean molar abundance | 3.3×10^-12 mol% (rank: 75th) crust molar abundance | 3.7×10^-5 mol% (rank: 50th)

half-life | (stable) stable isotopes | Er-166 (33.503%) | Er-168 (26.978%) | Er-167 (22.869%) | Er-170 (14.91%) | Er-164 (1.601%) | Er-162 (0.139%) nuclear spin | Er-143: 9/2^- | Er-144: 0^+ | Er-145: 1/2^+ | Er-146: 0^+ | Er-147: 11/2^- | Er-148: 0^+ | Er-149: 1/2^+ | Er-150: 0^+ | Er-151: 7/2^- | Er-152: 0^+ | Er-153: 7/2^- | Er-154: 0^+ | Er-155: 7/2^- | Er-156: 0^+ | Er-157: 3/2^- | Er-158: 0^+ | Er-159: 3/2^- | Er-160: 0^+ | Er-161: 3/2^- | Er-162: 0^+ | Er-163: 5/2^- | Er-164: 0^+ | Er-165: 5/2^- | Er-166: 0^+ | Er-167: 7/2^+ | Er-168: 0^+ | Er-169: 1/2^- | Er-170: 0^+ | Er-171: 5/2^- | Er-172: 0^+ | Er-173: 7/2^- | Er-174: 0^+ | Er-175: 9/2^+ | Er-176: 0^+ | Er-177: 1/2^- unstable isotopes | Er-169 (9.4 days) | Er-172 (49.3 h) | Er-160 (28.58 h) | Er-165 (10.4 h) | Er-171 (7.5167 h) | Er-161 (193 min) | Er-158 (137.3 min) | Er-163 (75 min) | Er-159 (37 min) | Er-156 (19.5 min) | Er-157 (18.65 min) | Er-155 (5.33 min) | Er-154 (224 s) | Er-174 (190 s) | Er-173 (84 s) | Er-175 (72 s) | Er-153 (37.1 s) | Er-151 (23.5 s) | Er-176 (20 s) | Er-150 (18.5 s) | Er-152 (10.3 s) | Er-148 (4.6 s) | Er-149 (4 s) | Er-177 (3 s) | Er-147 (2.5 s) | Er-146 (1.7 s) | Er-145 (900 ms) | Er-143 (200 ms) | Er-144 (200 ns) neutron cross-section | 165 b neutron mass absorption | 0.036 m^2/kg

CAS number | 7440-52-0 PubChem CID number | 23980