Properties of Lutetium (Lu)
Lutetium is a chemical element with the symbol (Lu) and atomic number 71. It belongs to the lanthanide series, a group of rare-earth elements. Lutetium is a silvery-white, rare metal, and it is the last element in the lanthanide series. It is often used in various applications, such as in the production of certain types of catalysts, phosphors for LED lights, and in medical imaging devices.
The following table provides a comprehensive list of lutetium (Lu) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Crystal Structure | Hexagonal close-packed (hcp) |
| Atomic Number | 71 |
| Molar Mass | 174.967 g/mol |
| Density | 9840 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 68.6 GPa |
| Shear Modulus (G) | 27.2 GPa |
| Bulk Modulus (K) | 47.6 GPa |
| Poisson’s Ratio (ν) | 0.261 |
| Thermal Properties | Metric |
| Melting Point | 1663 °C |
| Boiling Point | 3400 °C |
| Thermal Conductivity (27°C) | 16.4 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 154 J/kg·K |
| Coefficient of Thermal Expansion (αL) (25°C) | 9.9×10-6 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 5.82×10-5 Ω·cm |
Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)