samarium

samarium (chemical element)

Periodic table location

Image

atomic symbol | Sm atomic number | 62 short electronic configuration | [Xe]6s^24f^6 Aufbau diagram | 4f 6s block | f period | 6 atomic mass | 150.36 u (unified atomic mass units)

phase at STP | solid melting point | 1072 °C (rank: 44th) boiling point | 1803 °C (rank: 57th) molar heat of fusion | 8.6 kJ/mol (rank: 50th) molar heat of vaporization | 175 kJ/mol (rank: 55th) specific heat at STP | 196 J/(kg K) (rank: 56th) Néel point | 106 K (properties at standard conditions)

density | 7.353 g/cm^3 (rank: 44th) liquid density | 7.16 g/cm^3 molar volume | 20.45 cm^3/mol Mohs hardness | 1.4 (between talc and gypsum) Vickers hardness | 412 MPa (rank: 34th) Brinell hardness | 441 MPa (rank: 34th) bulk modulus | 38 GPa (rank: 44th) shear modulus | 20 GPa Young's modulus | 50 GPa (rank: 39th) Poisson ratio | 0.27 (rank: 34th) tensile yield strength | 90 MPa (rank: 18th) ultimate tensile strength | 138 MPa (rank: 23rd) sound speed | 2130 m/s (rank: 52nd) thermal expansion | 1.27×10^-5 K^(-1) (rank: 27th) thermal conductivity | 13 W/(m K) (rank: 62nd) (properties at standard conditions)

electrical type | conductor resistivity | 9.4×10^-7 Ω m (ohm meters) electrical conductivity | 1.1×10^6 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 8.1618×10^-4 mass magnetic susceptibility | 1.11×10^-7 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 1.669×10^-8 m^3/mol (cubic meters per mole) Néel point | 106 K (kelvins) work function | 2.7 eV (Polycrystalline) threshold frequency | 6.529×10^14 Hz (hertz) color | (silver)

valence | 3 electronegativity | 1.17 electron affinity | 50 kJ/mol (kilojoules per mole) first ionization energy | 544.5 kJ/mol (kilojoules per mole) ionization energies | 544.5 kJ/mol | 1070 kJ/mol | 2260 kJ/mol | 3990 kJ/mol

Reactivity

term symbol | ^7F_0 atomic radius | 185 pm covalent radius | 198 pm (electronic ground state properties)

(neutral samarium atomic spectrum)

universe abundance | 5×10^-7 mass% (rank: 45th) solar abundance | 1×10^-7 mass% (rank: 57th) meteorite abundance | 1.7×10^-5 mass% (rank: 58th) crust abundance | 6×10^-4 mass% (rank: 41st) ocean abundance | 4.5×10^-11 mass% (rank: 70th) universe molar abundance | 4×10^-9 mol% (rank: 49th) solar molar abundance | 9.9×10^-10 mol% (rank: 53rd) meteorite molar abundance | 2×10^-6 mol% (rank: 56th) ocean molar abundance | 1.9×10^-12 mol% (rank: 81st) crust molar abundance | 8.2×10^-5 mol% (rank: 40th)

half-life | (stable) stable isotopes | Sm-152 (26.75%) | Sm-154 (22.75%) | Sm-149 (13.82%) | Sm-150 (7.38%) | Sm-144 (3.07%) nuclear spin | Sm-128: 0^+ | Sm-130: 0^+ | Sm-131: 5/2^+ | Sm-132: 0^+ | Sm-133: 5/2^+ | Sm-134: 0^+ | Sm-136: 0^+ | Sm-137: 9/2^- | Sm-138: 0^+ | Sm-139: 1/2^+ | Sm-140: 0^+ | Sm-141: 1/2^+ | Sm-142: 0^+ | Sm-143: 3/2^+ | Sm-144: 0^+ | Sm-145: 7/2^- | Sm-146: 0^+ | Sm-147: 7/2^- | Sm-148: 0^+ | Sm-149: 7/2^- | Sm-150: 0^+ | Sm-151: 5/2^- | Sm-152: 0^+ | Sm-153: 3/2^+ | Sm-154: 0^+ | Sm-155: 3/2^- | Sm-156: 0^+ | Sm-157: 3/2^- | Sm-158: 0^+ | Sm-159: 5/2^- | Sm-160: 0^+ | Sm-161: 7/2^+ | Sm-162: 0^+ | Sm-163: 1/2^- | Sm-164: 0^+ | Sm-165: 5/2^- unstable isotopes | Sm-148 (7 quadrillion yr) | Sm-147 (106 billion yr) | Sm-146 (0.103 Gyr) | Sm-151 (89 yr) | Sm-145 (340 days) | Sm-153 (46.2833 h) | Sm-156 (9.4 h) | Sm-142 (72.48 min) | Sm-155 (22.33 min) | Sm-140 (14.82 min) | Sm-141 (10.2 min) | Sm-143 (8.75 min) | Sm-157 (8.03 min) | Sm-158 (5.3 min) | Sm-138 (190 s) | Sm-139 (154 s) | Sm-136 (47 s) | Sm-137 (45 s) | Sm-159 (11.37 s) | Sm-135 (10.3 s) | Sm-160 (9.6 s) | Sm-134 (9.5 s) | Sm-161 (4.8 s) | Sm-132 (4 s) | Sm-133 (3.7 s) | Sm-162 (2.4 s) | Sm-131 (1.2 s) | Sm-163 (1 s) | Sm-130 (1 s) | Sm-129 (550 ms) | Sm-164 (500 ms) | Sm-128 (500 ms) | Sm-165 (200 ms) neutron cross-section | 5900 b neutron mass absorption | 4.7 m^2/kg

CAS number | 7440-19-9 PubChem CID number | 23951