properties of terbium

terbium (chemical element)

Periodic table location

Image

atomic symbol | Tb atomic number | 65 short electronic configuration | [Xe]6s^24f^9 Aufbau diagram | 4f 6s block | f period | 6 atomic mass | 158.92535 u (unified atomic mass units)

phase at STP | solid melting point | 1356 °C (rank: 35th) boiling point | 3230 °C (rank: 28th) molar heat of fusion | 10.8 kJ/mol (rank: 45th) molar heat of vaporization | 295 kJ/mol (rank: 41st) specific heat at STP | 182 J/(kg K) (rank: 61st) Néel point | 230 K (properties at standard conditions)

density | 8.219 g/cm^3 (rank: 40th) liquid density | 7.65 g/cm^3 molar volume | 19.34 cm^3/mol Mohs hardness | 2.3 (between gypsum and calcite) Vickers hardness | 863 MPa (rank: 22nd) Brinell hardness | 677 MPa (rank: 25th) bulk modulus | 38.7 GPa (rank: 43rd) shear modulus | 22 GPa Young's modulus | 56 GPa (rank: 36th) Poisson ratio | 0.26 (rank: 36th) tensile yield strength | 60 MPa (rank: 22nd) ultimate tensile strength | 140 MPa (rank: 19th) sound speed | 2620 m/s (rank: 41st) thermal expansion | 1.03×10^-5 K^(-1) (rank: 38th) thermal conductivity | 11 W/(m K) (rank: 66th) (properties at standard conditions)

electrical type | conductor resistivity | 1.2×10^-6 Ω m (ohm meters) electrical conductivity | 830000 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 0.1117784 mass magnetic susceptibility | 1.36×10^-5 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 2.161385×10^-6 m^3/mol (cubic meters per mole) Curie point | 222 K (kelvins) Néel point | 230 K (kelvins) work function | 3 eV (Polycrystalline) threshold frequency | 7.254×10^14 Hz (hertz) color | (silver)

valence | 3 electron affinity | 50 kJ/mol (kilojoules per mole) first ionization energy | 565.8 kJ/mol (kilojoules per mole) ionization energies | 565.8 kJ/mol | 1110 kJ/mol | 2114 kJ/mol | 3839 kJ/mol

Reactivity

term symbol | ^6H_(15/2) atomic radius | 175 pm covalent radius | 194 pm (electronic ground state properties)

(neutral terbium atomic spectrum)

universe abundance | 5×10^-8 mass% (rank: 71st) solar abundance | 1×10^-8 mass% (rank: 71st) meteorite abundance | 3.9×10^-6 mass% (rank: 72nd) crust abundance | 9.3×10^-5 mass% (rank: 59th) ocean abundance | 1.4×10^-11 mass% (rank: 74th) universe molar abundance | 4×10^-10 mol% (rank: 68th) solar molar abundance | 9.9×10^-11 mol% (rank: 73rd) meteorite molar abundance | 5×10^-7 mol% (rank: 71st) ocean molar abundance | 5×10^-6 mol% (rank: 25th) crust molar abundance | 1.2×10^-5 mol% (rank: 59th)

half-life | (stable) stable isotopes | Tb-159 (100%) nuclear spin | Tb-137: 11/2^- | Tb-139: 11/2^- | Tb-140: 7^+ | Tb-141: 5/2^- | Tb-142: 1^+ | Tb-143: 11/2^- | Tb-144: 1^+ | Tb-145: 3/2^+ | Tb-146: 1^+ | Tb-147: 1/2^+ | Tb-148: 2^- | Tb-149: 1/2^+ | Tb-150: 2^- | Tb-151: 1/2^+ | Tb-152: 2^- | Tb-153: 5/2^+ | Tb-154: 0^+ | Tb-155: 3/2^+ | Tb-156: 3^- | Tb-157: 3/2^+ | Tb-158: 3^- | Tb-159: 3/2^+ | Tb-160: 3^- | Tb-161: 3/2^+ | Tb-162: 1^- | Tb-163: 3/2^+ | Tb-164: 5^+ | Tb-165: 3/2^+ | Tb-166: 2^- | Tb-167: 3/2^+ | Tb-168: 4^- | Tb-169: 3/2^+ | Tb-171: 3/2^+ unstable isotopes | Tb-158 (180 yr) | Tb-157 (70 yr) | Tb-160 (72.3 days) | Tb-161 (6.906 days) | Tb-156 (128 h) | Tb-155 (130 h) | Tb-153 (56.1 h) | Tb-154 (21.5 h) | Tb-152 (18 h) | Tb-151 (17.609 h) | Tb-149 (4.1167 h) | Tb-150 (208 min) | Tb-147 (100 min) | Tb-148 (60 min) | Tb-145 (20 min) | Tb-163 (19.5 min) | Tb-162 (7.6 min) | Tb-164 (180 s) | Tb-165 (127 s) | Tb-166 (25.1 s) | Tb-167 (19.4 s) | Tb-143 (12 s) | Tb-168 (8.2 s) | Tb-146 (8 s) | Tb-141 (3.5 s) | Tb-170 (3 s) | Tb-140 (2.4 s) | Tb-169 (2 s) | Tb-139 (1.6 s) | Tb-144 (1 s) | Tb-138 (800 ms) | Tb-142 (597 ms) | Tb-137 (600 ms) | Tb-171 (500 ms) | Tb-136 (200 ms) neutron cross-section | 23 b neutron mass absorption | 0.009 m^2/kg

CAS number | 7440-27-9 PubChem CID number | 23958