Properties of Gallium (Ga)
Gallium is a chemical element with the symbol (Ga) and atomic number 31. It is a soft, silvery metal that is in the boron group of the periodic table. Gallium is notable for its low melting point, just above room temperature, which allows it to melt in the hand.
The following table provides a comprehensive list of gallium (Ga) 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 | Orthorhombic |
| Atomic Number | 31 |
| Molar Mass | 69.723 g/mol |
| Density | 5910 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 9.81 GPa |
| Shear Modulus (G) | 6.67 GPa |
| Bulk Modulus (K) | 51 GPa |
| Poisson’s Ratio (ν) | 0.47 |
| Mohs Hardness | 1.5 |
| Thermal Properties | Metric |
| Melting Point | 29.76 °C |
| Boiling Point | 2400 °C |
| Thermal Conductivity (27°C) | 40.6 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 373 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.8×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 2.7×10-5 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.