Indium
49
In
Gruppe
13
Periode
5
Blokk
p
Proton
Elektron
Nøytron
49
49
66
Generelle eigenskapar
Atomnummer
49
Atommasse
114,818
Massetal
115
Kategori
Metall
Farge
Sølv
Radioaktiv
Nei
From the brilliant indigo line in its spectrum
Krystallstruktur
Sentrert tetragonal
Historie
Ferdinand Reich and Hieronymous Theodor Richter first identified indium in sphalerite by its bright indigo-blue spectroscopic emission line.
As no element was known with a bright blue emission they concluded that a new element was present in the minerals.
Richter went on to isolate the metal in 1864.
As no element was known with a bright blue emission they concluded that a new element was present in the minerals.
Richter went on to isolate the metal in 1864.
Elektron per energinivå
2, 8, 18, 18, 3
Elektronkonfigurasjon
[Kr] 4d10 5s2 5p1
When it is bent, indium emits a high-pitched 'cry'
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
7,31 g/cm3
Smeltepunkt
429,75 K | 156,6 °C | 313,88 °F
Kokepunkt
2345,15 K | 2072 °C | 3761,6 °F
Smeltevarme
3,26 kJ/mol
Fordampingsvarme
230 kJ/mol
Spesifikk varmekapasitet
0,233 J/g·K
Førekomst i jordskorpa
0,000016%
Førekomst i universet
3×10-8%
CAS-nummer
7440-74-6
PubChem CID-nummer
5359967
Atom eigenskapar
Atomradius
167 pm
Kovalent radius
142 pm
Elektronegativitet
1,78 (Paulings skala)
Ioniseringspotensial
5,7864 eV
Molart volum
15,7 cm3/mol
Termisk konduktivitet
0,816 W/cm·K
Oksidasjonstrinn
1, 2, 3
Bruksområde
Indium's current primary application is to form transparent electrodes from indium tin oxide in liquid crystal displays and touchscreens.
It is widely used in thin-films to form lubricated layers.
It is also used for making particularly low melting point alloys, and is a component in some lead-free solders.
It is widely used in thin-films to form lubricated layers.
It is also used for making particularly low melting point alloys, and is a component in some lead-free solders.
Indium is considered to be of low toxicity
Isotopar
Stabile isotopar
113InUstabile isotopar
97In, 98In, 99In, 100In, 101In, 102In, 103In, 104In, 105In, 106In, 107In, 108In, 109In, 110In, 111In, 112In, 114In, 115In, 116In, 117In, 118In, 119In, 120In, 121In, 122In, 123In, 124In, 125In, 126In, 127In, 128In, 129In, 130In, 131In, 132In, 133In, 134In, 135In