Properties of Rhenium (Re)
Rhenium is a chemical element with the symbol (Re) and atomic number 75. It is a silvery-white, dense metal with one of the highest melting points among the elements. Rhenium is one of the rarest elements in Earth’s crust, and it is often found in association with other metals like molybdenum.
The following table provides a comprehensive list of rhenium (Re) 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 | 75 |
| Molar Mass | 186.207 g/mol |
| Density | 21020 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 520 GPa |
| Shear Modulus (G) | 181 GPa |
| Bulk Modulus (K) | 379 GPa |
| Poisson’s Ratio (ν) | 0.26 |
| Mohs Hardness | 7 |
| Thermal Properties | Metric |
| Melting Point | 3185 °C |
| Boiling Point | 5590 °C |
| Thermal Conductivity (27°C) | 47.9 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 137 J/kg·K |
| Coefficient of Thermal Expansion (αL) (25°C) | 6.2×10-6 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 1.72×10-5 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)
Related Pages
References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) A.M. Howatson, P.G. Lun, J.D. Todd, P.D. Engineering Tables and Data. United Kingdom: University of Oxford, Department of Engineering Science, 2009.