Properties of Barium (Ba)
Barium is a chemical element with the symbol (Ba) and atomic number 56. It belongs to the alkaline earth metal group on the periodic table. Barium is a soft, silvery-white metal that is highly reactive with air and water, and it forms various compounds. In nature, it is often found in the mineral barite.
The following table provides a comprehensive list of barium (Ba) 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 | Body-centered cubic (bcc) |
| Atomic Number | 56 |
| Molar Mass | 137.327 g/mol |
| Density | 3590 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 12.8 GPa |
| Shear Modulus (G) | 4.86 GPa |
| Bulk Modulus (K) | 10.3 GPa |
| Poisson’s Ratio (ν) | 0.28 |
| Mohs Hardness | 1.25 |
| Thermal Properties | Metric |
| Melting Point | 727 °C |
| Boiling Point | 1845 °C |
| Thermal Conductivity (27°C) | 18.4 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 205 J/kg·K |
| Coefficient of Thermal Expansion (αL) (25°C) | 2.06×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 3.32×10-5 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)
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.