Properties of Antimony (Sb)
Antimony is a chemical element with the symbol Sb and the atomic number 51. It is classified as a metalloid and is mainly found in nature as the sulfide mineral stibnite. Throughout history, antimony has been used by humans for a variety of purposes, 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 button 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.