TABLE OF CONTENTS Wei Zhang and M. Razeghi, Center for Quantum Devices, Northwestern University
Antimony (Sb) is a semimetal and has an atomic number of 51 and atomic weight of 121.760. It is located in group 15 (V-A) and period 5 in the chemical periodic table. Antimony is solid at room temperature and standard state. In its elemental form it is a silvery white, brittle crystalline solid. It is not acted on by air at room temperature, but burns brilliantly when heated and forms white fumes. It is a poor conductor of heat and electricity. The physical data for antimony are summarized in Table 7.1.
| Symbol | Sb | |
|---|---|---|
| Atomic number | 51 | |
| Atomic weight | 121.760 amu | |
| Steric | Atomic radius | 1.53 |
| Ionic radiu | 0.76k | |
| Covalent radius | 1.40 | |
| Atomic volume | 18.23cm 3/mol | |
| Density (293K) | 6.684 g/cm 3 | |
| Crystal structure | Rhombohedral | |
| Electronic | Shells | 2,8,18,18,5 |
| Orbitals | [Kr] 4d 10 5s 2 5p 3 | |
| Electronegativity | 1.8, 1.9 | |
| Oxidation states | 5, 3, -3 | |
| Electrical resistivity | 4 10 -7 ?m | |
| Thermal | Melting point | 630.74 C |
| Boiling point | 1,587 C | |
| Specific heat | 0.21 J/g K | |
| Heat of fusion | 19.870 kJ/mol | |
| Heat of vaporization | 77.140 kJ/mol | |
| Thermal conductivity | 0.243 W/cm K |
Antimony has been known and used since ancient times. The name antimony comes from the Greek words anti + monos, meaning "not alone," because it is often found in ores such...
