Properties of Rhodium (Rh)
Rhodium is a chemical element with the symbol (Rh) and atomic number 45. It is a rare and precious metal that belongs to the platinum group of metals. Rhodium is known for its silvery-white appearance, high reflectance, and resistance to corrosion.
The following table provides a comprehensive list of rhodium (Rh) properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).
Click on the button to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Crystal Structure | Face-centered cubic (fcc) |
| Atomic Number | 45 |
| Molar Mass | 102.9055 g/mol |
| Density | 12410 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 379 GPa |
| Shear Modulus (G) | 147 GPa |
| Bulk Modulus (K) | 276 GPa |
| Poisson’s Ratio (ν) | 0.26 |
| Mohs Hardness | 6 |
| Thermal Properties | Metric |
| Melting Point | 1964 °C |
| Boiling Point | 3695 °C |
| Thermal Conductivity (27°C) | 150 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 243 J/kg·K |
| Coefficient of Thermal Expansion (αL) (25°C) | 8.2×10-6 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 4.3×10-6 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)
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.