Properties of Antimony (Sb)
Antimony is a chemical element with the symbol (Sb) and atomic number 51. It belongs to the group of metalloids and is found in nature primarily as the sulfide mineral stibnite. Antimony has been used by humans for various purposes throughout history, including in alloys, flame retardants, and as a component in certain types of batteries.
The following table provides a comprehensive list of antimony (Sb) 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 | Rhombic |
| Atomic Number | 51 |
| Molar Mass | 121.76 g/mol |
| Density | 6696 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 54.7 GPa |
| Shear Modulus (G) | 20.7 GPa |
| Poisson’s Ratio (ν) | 0.25 |
| Mohs Hardness | 3 |
| Thermal Properties | Metric |
| Melting Point | 630.63 °C |
| Boiling Point | 1635 °C |
| Thermal Conductivity (27°C) | 24.3 W/m·K |
| Specific Heat Capacity (Cp) (25°C) | 205 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 8.5×10-6 1/°C |
| Electrical Properties | Metric |
| Electrical Resistivity | 3.9×10-5 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.