Properties of Xenon (Xe)
Xenon is a chemical element with the symbol Xe and atomic number 54. It is a dense, colorless, odorless noble gas that is found in trace amounts in Earth’s atmosphere. Xenon is most commonly known for its use in lighting, such as xenon headlights in cars, as well as in certain types of lamps and lasers.
The following table provides a comprehensive list of xenon 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 |
|---|---|
| Molar Mass | 131.293 g/mol |
| Density | 5.894 kg/m3 |
| Dynamic Viscosity (25°C) | 23.2 µPa·s |
| Speed of Sound in Gas | 178 m/s |
| Thermal Properties | Metric |
| Melting Point | -111.8 °C |
| Boiling Point | -108.1 °C |
| Thermal Conductivity (25°C) | 5.6×10-3 W/m·K |
| Specific Heat Capacity (Cp) | 160 J/kg·K |
| Critical Constants | Metric |
| Critical Temperature (Tc) | 16.6 °C |
| Critical Pressure (Pc) | 5.84 MPa |
| Critical Density (ρc) | 1105 kg/m3 |
| Electrical Properties | Metric |
| Relative Permittivity (εr) | 1.001238 |
| Optical Properties | Metric |
| Refractive Index (589 nm) | 1.000642 |
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) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Fire Protection Guide to Hazardous Materials, 14th Edition. United States: National Fire Protection Association, 2010.