Indium
49
In
Gruppe
13
Periode
5
Blok
p
Protoner
Elektroner
Neutroner
49
49
66
Generelle Egenskaber
Atomnummer
49
Atommasse
114,818
Masseantal
115
Kategori
Post-overgangsmetaller
Farve
Sølv
Radioaktiv
Nej
From the brilliant indigo line in its spectrum
Krystalstruktur
Rumcentreret 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.
Elektroner i hver skal
2, 8, 18, 18, 3
Elektronkonfiguration
[Kr] 4d10 5s2 5p1
When it is bent, indium emits a high-pitched 'cry'
Fysiske Egenskaber
Tilstandsform
Fast stof
Massefylde
7,31 g/cm3
Smeltepunkt
429,75 K | 156,6 °C | 313,88 °F
Kogepunkt
2345,15 K | 2072 °C | 3761,6 °F
Smeltevarme
3,26 kJ/mol
Fordampningsvarme
230 kJ/mol
Varmefylde
0,233 J/g·K
Forekomst i jordskorpen
0,000016%
Forekomst i universet
3×10-8%
CAS-nummer
7440-74-6
PubChem CID-nummer
5359967
Atomare egenskaber
Atomradius
167 pm
Kovalent radius
142 pm
Elektronegativitet
1,78 (Paulings skala)
Ioniseringspotentiale
5,7864 eV
Atomvolumen
15,7 cm3/mol
Varmeledningsevne
0,816 W/cm·K
Oxidationstrin
1, 2, 3
Anvendelser
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
Isotoper
Stabile isotoper
113InUstabile isotoper
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