 |
| General |
| Name | Indium |
| Symbol | In |
| Number | 49 |
| Group Number | 13 |
| Group | Metal |
| Block | p |
| Density | 7.31 g/cm3 |
| Atomic Weight | 114.82 g/mol |
| Atomic Volume | 15.7 cm3/mol |
| Discover | 1863 |
|
| States |
| State | Solid |
| Melting Point | 429.75 K |
| Boiling Point | 2345 K |
| Triple Point | Nil |
| Critical Point | Nil |
| Heat of Fusion | 3.281 kJ/mol |
| Heat of Vaporization | 231.8 kJ/mol |
|
| Energies |
| First Ionization Energy | 558.3 kJ/mole |
| Second Ionization Energy | 1820.6 kJ/mole |
| Third Ionization Energy | 2704.5 kJ/mole |
| Electronegativity | 1.78 |
| Electron Affinity | 30 kJ/mole |
| Specific Heat | 0.23 J/gK |
| Heat Atomization | 243 kJ/mole atoms |
|
| Oxidation and Electrons |
| Shells | 2,8,18,18,3 |
| Electron Configuration | [Kr] 4d10 5s2 5p1 |
| Minimum Oxidation Number | 0 |
| Maximum Oxidation Number | 3 |
| Minimum Common Oxidation Number | 0 |
| Maximum Common Oxidation Number | 3 |
|
| Appearance and Characteristics |
| Crystal Structure | tetragonal |
| Characteristics | soft |
| Color | silvery-white |
| Uses | transistors, photocells |
| Hardness | 1.2 mohs |
| Toxicity | None |
|
| Reactions |
| Reaction with Air | mild, =>In2O3 |
| Reaction with 6M HCl | mild, =>H2, InCl3 |
| Reaction with 15M HNO3 | mild, =>In(NO3)3 |
| Reaction with 6M NaOH | None |
|
| Other Forms |
| Number of Isotopes | 2 |
| Hydride | None |
| Oxide | In2O3 |
| Chloride | InCl InCl3 |
|
| Radius |
| Atomic Radius | 167 pm |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | Nil |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | 94 pm |
|
| Conductivity |
| Thermal Conductivity | 81.8 J/m-sec-deg |
| Electrical Conductivity | 119.474 1/mohm-cm |
| Polarizability | 9.7 A3 |
|
| Abundance |
| Source | Zn/Pb smelting by-product |
| Relation Abundance Solar System | -0.735 log |
| Abundance Earth's Crust | -1 log |
|
