Stable isotope Lutetium (Lu)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Lu-175 71 104 174.940768 97.41% 99.80% Oxide
Lu-176 71 105 175.942683 2.59% 60.00-84.60% Oxide

Properties of Lithium

Name Lutetium
Symbol Lu
Atomic number 71
Atomic weight 174.97
Standard state Solid at 298 ºK
CAS Registry ID 7439-94-3
Group in periodic table 3
Group name N/A
Period in periodic table 6
Block in periodic table d-block
Color Silvery white
Classification Metallic
Melting point 1663 °C
Boiling point 3395 °C
Vaporization point 3402 ºC
Thermal conductivity 16.4 W/(m·K) at 298.2 °K
Electrical resistivity 79.0 µΩ·cm at 25 °C
Electronegativity 1.2
Specific heat 0.155 J/g mol at 25 °C
Heat of vaporization 415 kJ·mol-1 at 3395 °C
Heat of fusion 22 kJ·mol-1
Density of liquid 9.3 g/cm3 at 1663 °C
Density of solid 9.84 g/cm3
Electron configuration [Xe]4f145d16s2
Atomic radius 1.7349 Å (coordination number 12)
Ionic radius Lu3+: 0.85 Å
Oxidation state +3