Indi
49
In
Grup
13
Període
5
Bloc
p
Protons
Electrons
Neutrons
49
49
66
Propietats Generals
Nombre atòmic
49
Massa atòmica
114,818
Nombre de massa
115
Categoria
Metalls post-transició
Color
Plata
Radioactiu
No
From the brilliant indigo line in its spectrum
Estructura cristal·lina
Tetragonal centrada
Història
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.
Electrons per capa
2, 8, 18, 18, 3
Configuració electrònica
[Kr] 4d10 5s2 5p1
When it is bent, indium emits a high-pitched 'cry'
Propietats Físiques
Fase
Sòlid
Densitat
7,31 g/cm3
Punt de fusió
429,75 K | 156,6 °C | 313,88 °F
Punt d'ebullició
2345,15 K | 2072 °C | 3761,6 °F
Entalpia de fusió
3,26 kJ/mol
Entalpia de vaporització
230 kJ/mol
Capacitat tèrmica específica
0,233 J/g·K
Abundància a l'escorça terrestre
0,000016%
Abundància a l'univers
3×10-8%
Número CAS
7440-74-6
Número CID de PubChem
5359967
Propietats Atòmiques
Radi atòmic
167 pm
Radi covalent
142 pm
Electronegativitat
1,78 (Escala de Pauling)
Potencial d'ionització
5,7864 eV
Volum atòmic
15,7 cm3/mol
Conductivitat tèrmica
0,816 W/cm·K
Estats d'oxidació
1, 2, 3
Aplicacions
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
Isòtops
Isòtops estables
113InIsòtops inestables
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