name of hafnium

hafnium (chemical element)

Periodic table location

Image

atomic symbol | Hf atomic number | 72 short electronic configuration | [Xe]6s^24f^145d^2 Aufbau diagram | 5d 4f 6s block | d group | 4 period | 6 atomic mass | 178.49 u (unified atomic mass units)

phase at STP | solid melting point | 2233 °C (rank: 10th) boiling point | 4603 °C (rank: 8th) molar heat of fusion | 25.5 kJ/mol (rank: 14th) molar heat of vaporization | 630 kJ/mol (rank: 6th) specific heat at STP | 144 J/(kg K) (rank: 70th) (properties at standard conditions)

density | 13.31 g/cm^3 (rank: 17th) liquid density | 12 g/cm^3 molar volume | 13.41 cm^3/mol Mohs hardness | 5.5 (between apatite and microcline) Vickers hardness | 1760 MPa (rank: 9th) Brinell hardness | 1700 MPa (rank: 7th) bulk modulus | 110 GPa (rank: 21st) shear modulus | 30 GPa Young's modulus | 78 GPa (rank: 25th) Poisson ratio | 0.37 (rank: 7th) sound speed | 3010 m/s (rank: 34th) thermal expansion | 5.9×10^-6 K^(-1) (rank: 58th) thermal conductivity | 23 W/(m K) (rank: 48th) (properties at standard conditions)

electrical type | conductor resistivity | 3×10^-7 Ω m (ohm meters) electrical conductivity | 3.3×10^6 S/m (siemens per meter) magnetic type | paramagnetic volume magnetic susceptibility | 7.05×10^-5 mass magnetic susceptibility | 5.3×10^-9 m^3/kg (cubic meters per kilogram) molar magnetic susceptibility | 9.46×10^-10 m^3/mol (cubic meters per mole) work function | 3.9 eV (Polycrystalline) threshold frequency | 9.43×10^14 Hz (hertz) superconducting point | 0.128 K (kelvins) color | (gray)

valence | 4 electronegativity | 1.3 electron affinity | 0 kJ/mol (kilojoules per mole) first ionization energy | 658.5 kJ/mol (kilojoules per mole) ionization energies | 658.5 kJ/mol | 1440 kJ/mol | 2250 kJ/mol | 3216 kJ/mol

Reactivity

term symbol | ^3F_2 atomic radius | 155 pm covalent radius | 175 pm (electronic ground state properties)

(neutral hafnium atomic spectrum)

universe abundance | 7×10^-8 mass% (rank: 66th) solar abundance | 1×10^-7 mass% (rank: 57th) meteorite abundance | 1.7×10^-5 mass% (rank: 58th) crust abundance | 3.3×10^-4 mass% (rank: 43rd) ocean abundance | 8×10^-10 mass% (rank: 52nd) universe molar abundance | 5×10^-10 mol% (rank: 67th) solar molar abundance | 9.9×10^-10 mol% (rank: 53rd) meteorite molar abundance | 2×10^-6 mol% (rank: 56th) ocean molar abundance | 2.8×10^-11 mol% (rank: 65th) crust molar abundance | 3.8×10^-5 mol% (rank: 48th)

half-life | (stable) stable isotopes | Hf-180 (35.08%) | Hf-178 (27.28%) | Hf-177 (18.6%) | Hf-179 (13.62%) | Hf-176 (5.26%) nuclear spin | Hf-153: 1/2^+ | Hf-154: 0^+ | Hf-155: 7/2^- | Hf-156: 0^+ | Hf-157: 7/2^- | Hf-158: 0^+ | Hf-159: 7/2^- | Hf-160: 0^+ | Hf-161: 3/2^- | Hf-162: 0^+ | Hf-163: 3/2^- | Hf-164: 0^+ | Hf-165: 5/2^- | Hf-166: 0^+ | Hf-167: 5/2^- | Hf-168: 0^+ | Hf-169: 5/2^- | Hf-170: 0^+ | Hf-171: 7/2^+ | Hf-172: 0^+ | Hf-173: 1/2^- | Hf-174: 0^+ | Hf-175: 5/2^- | Hf-176: 0^+ | Hf-177: 7/2^- | Hf-178: 0^+ | Hf-179: 9/2^+ | Hf-180: 0^+ | Hf-181: 1/2^- | Hf-182: 0^+ | Hf-183: 3/2^- | Hf-184: 0^+ | Hf-185: 3/2^- | Hf-186: 0^+ | Hf-187: 3/2^- | Hf-188: 0^+ unstable isotopes | Hf-174 (2 quadrillion yr) | Hf-182 (8.9 Myr) | Hf-172 (1.9 yr) | Hf-175 (69 days) | Hf-181 (42.38 days) | Hf-173 (24 h) | Hf-170 (16.011 h) | Hf-171 (12.1 h) | Hf-184 (4.11 h) | Hf-183 (64.02 min) | Hf-168 (25.95 min) | Hf-166 (6.77 min) | Hf-185 (210 s) | Hf-169 (194 s) | Hf-186 (160 s) | Hf-167 (123 s) | Hf-164 (111 s) | Hf-165 (76 s) | Hf-163 (40 s) | Hf-162 (39.4 s) | Hf-187 (30 s) | Hf-188 (20 s) | Hf-161 (18.2 s) | Hf-160 (13.6 s) | Hf-159 (5.6 s) | Hf-158 (2.85 s) | Hf-154 (2 s) | Hf-155 (890 ms) | Hf-157 (110 ms) | Hf-156 (23 ms) | Hf-153 (60 ns) neutron cross-section | 104 b neutron mass absorption | 0.02 m^2/kg

CAS number | 7440-58-6 PubChem CID number | 23986