|
49
In
114.82
Indium |
Appearance & Characteristics | Reactions |
Other Forms Radius | Conductivity | Abundance
General:
| Name: Indium | Symbol: In |
| Group: Metal | Atomic weight: 114.82 |
| Density @ 293 K: 7.31 g/cm3 | Atomic volume: 15.7 cm3/mol |
| Group: Metal | Discovered: 1863 |
States
| State (s, l, g): solid | |
| Melting point: 429.81 K | Boiling point: 2353 K |
| Heat of fusion: 3.263 kJ/mol | Heat of vaporization: 231.50 kJ/mol |
Energies
| 1st ionization energy: 558.3 kJ/mole | |
| Electronegativity: 1.78 | 2nd ionization energy: 1820.6 kJ/mole |
| Electron affinity: 30 kJ/mole | 3rd ionization energy: 2704.5 kJ/mole |
| Specific heat: 0.23 J/gK | Heat atomization: 243 kJ/mole atoms |
Oxidation & Electrons
| Shells: 2,8,18,18,3 | Electron configuration: [Kr] 4d10 5s2 5p1 |
| Minimum oxidation number: 0 | Maximum oxidation number: 3 |
| Min. common oxidation no.: 0 | Max. common oxidation no.: 3 |
Appearance & Characteristics
| Structure: distorted fcc Structure | Color: silvery-white |
| Uses: transistors, photocells | Toxicity: |
| Hardness: 1.2 mohs | Characteristics: soft |
Reactions
| Reaction with air: mild, => In2O3 | |
| Reaction with 6 M HCl: mild, => H2, InCl3 | Reaction with 6 M HCl: mild, => H2, InCl3 |
| Reaction with 15 M HNO3: mild, => In(NO3)3 | Reaction with 6 M NaOH: none |
Other Forms
| Number of isotopes: 2 | Hydride(s): |
| Oxide(s): In2O3 | Chloride(s): InCl InCl3 |
Radius
| Ionic radius (2- ion): pm | Ionic radius (1- ion): pm |
| Atomic radius: 167 pm | Ionic radius (1+ ion): pm |
| Ionic radius (2+ ion): pm | 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 A^3 |
Abundance
| Source: Zn/Pb smelting by-product | |
| Rel. abund. solar system: -0.735 log | Abundance earth's crust: -1 log |
| cost, pure: 120 $/100g | cost, bulk: $/100g |
