Indium element properties

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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


state (s, l, g): s
melting point: 429.81 K boiling point: 2353 K
Heat of fusion: 3.263 kJ/mol Heat of vaporization: 231.50 kJ/mol


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


reaction with air: mild, =>In2O3
reaction with 6M HCl: mild, =>H2, InCl3 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(s):
oxide(s): In2O3 chloride(s): InCl InCl3


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


thermal conductivity: 81.8 J/m-sec-deg
electrical conductivity: 119.474 1/mohm-cm polarizability: 9.7 A^3


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

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