Indium

49
In
Gruppe
13
Periode
5
Blok
p
Protons
Electrons
Neutrons
49
49
66
General Properties
Atomnummer
49
Atommasse
114,818
Mass Number
115
Kategori
Post-overgangsmetaller
Farve
Silver
Radioactive
Nej
From the brilliant indigo line in its spectrum
Krystalstruktur
Rumcentreret Tetragonal
History
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.
Elektroner i hver skal
2, 8, 18, 18, 3
Elektronkonfiguration
[Kr] 4d10 5s2 5p1
In
When it is bent, indium emits a high-pitched 'cry'
Physical Properties
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
Abundance in Earth's crust
0,000016%
Abundance in Universe
3×10-8%
Ingot
Billede akkrediteringer: Images-of-elements
Ingot of 40 grams of indium
CAS Number
7440-74-6
PubChem CID Number
5359967
Atomic Properties
Atomradius
167 pm
Kovalent radius
142 pm
Elektronegativitet
1,78 (Paulings skala)
Ionization Potential
5,7864 eV
Atomic Volume
15,7 cm3/mol
Varmeledningsevne
0,816 W/cm·K
Oxidationstrin
1, 2, 3
Applications
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.
Indium is considered to be of low toxicity
Isotoper
Stable Isotopes
113In
Unstable Isotopes
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