Indium (In)

Indium is the 49th element in the periodic table and has a symbol of In and atomic number of 49. It has an atomic weight of 114.818 and a mass number of 115. Indium has forty-nine protons and sixty-six neutrons in its nucleus, and forty-nine electrons in five shells. It is located in group thirteen, period five and block p of the periodic table. Soft silvery element belonging to group 13 of the periodic table. The most common natural isotope is In-115, which has a half-life of 6*10^4 years. Five other radioisotopes exist. Discovered in 1863 by Reich and Richter.

Atomic Number	49
Atomic Weight	114.818
Mass Number	115

Group	13
Period	5
Block	p

Protons	49 p⁺
Neutrons	66 n⁰
Electrons	49 e^-

Physical Properties

Atomic Radius	155 pm 246 pm
Molar Volume	15.7 cm³/mol
Covalent Radius	142 pm 136 pm 146 pm 142 pm
Metallic Radius	142 pm 158 pm
Ionic Radius	62 pm 80 pm 92 pm
Crystal Radius	76 pm 94 pm 106 pm
Van der Waals Radius	220 pm 193 pm 459 pm 193 pm 264 pm 446.3 pm
Density	7.31 g/cm³ 7,020 kg/m³

Chemical Properties

Energy

Proton Affinity
Electron Affinity	0.3 eV/particle
Ionization Energy	5.7863552 eV/particle 18.870407 eV/particle 28.04415 eV/particle 55.45 eV/particle 69.3 eV/particle 90 eV/particle 109 eV/particle 130.1 eV/particle 156 eV/particle 178 eV/particle 201 eV/particle 226 eV/particle 249 eV/particle 341 eV/particle 368 eV/particle 396 eV/particle 425 eV/particle 462 eV/particle 497.11 eV/particle 560 eV/particle 593.38 eV/particle 1,043 eV/particle 1,109 eV/particle 1,181 eV/particle 1,255 eV/particle 1,328 eV/particle 1,413 eV/particle 1,496 eV/particle 1,575 eV/particle 1,659 eV/particle 1,738 eV/particle 1,961 eV/particle 2,028.5 eV/particle 2,111 eV/particle 2,207 eV/particle 2,317 eV/particle 2,373 eV/particle 2,555 eV/particle 2,628.774 eV/particle 6,126 eV/particle 6,331 eV/particle 6,554 eV/particle 6,770 eV/particle 7,196 eV/particle 7,442 eV/particle 7,754 eV/particle 7,953.137 eV/particle 32,837.59 eV/particle 33,750.31 eV/particle

Heat of Vaporization	225.1 kJ/mol
Heat of Fusion	3.24 kJ/mol
Heat of Formation	243 kJ/mol
Electrons

Electron Shells	2, 8, 18, 18, 3

Valence Electrons	3 ⓘ

Electron Configuration	[Kr] 4d¹⁰ 5s² 5p¹ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d¹⁰ 5s² 5p¹

Oxidation States	-5, -2, -1, 0, 1, 2, 3
Electronegativity	9.793 eV/particle 0.16423 1.78
Electrophilicity Index	0.8439965667135223 eV/particle
States of Matter

Phase	Solid
Gas Phase
Boiling Point	2,300.15 K
Melting Point	429.7485 K
Critical Pressure
Critical Temperature
Triple Point	429.7436 K
Visual
Indium is a Silver. In has a CPK of #ff1493, Jmol of #a67573, and MOLCAS GV of #a67573. The Appearance of Element 49 is silvery lustrous gray.
Color	Silver #ff1493 #a67573 #a67573
Appearance	silvery lustrous gray
Refractive Index
Thermodynamic Properties
Thermal Conductivity	81.8 W/(m K)
Thermal Expansion	0.0000321 1/K
Molar Heat Capacity	26.74 J/(mol K)
Specific Heat Capacity	0.233 J/(g⋅K)
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type	Conductor
Electrical Conductivity	12 MS/m
Electrical Resistivity	0.00000008000000000001 m Ω
Superconducting Point	3.41 K
Magnetism
Type	diamagnetic
Magnetic Susceptibility (Mass)	-0.0000000014 m³/Kg
Magnetic Susceptibility (Molar)	-0.000000000161 m³/mol
Magnetic Susceptibility (Volume)	-0.0000102
Magnetic Ordering
Curie Point
Neel Point
Structure
The Crystal Structure of Indium is TET. The lattice constant of In is 4.59 Å. The lattice angles of Element 49 are π/2, π/2, π/2.
Crystal Structure	Centered Tetragonal (TET)
Lattice Constant	4.59 Å
Lattice Angles	π/2, π/2, π/2
Mechanical Properties
Indium has a Brinell of 8.83 MPa, and Mohs hardness of 1.2 MPa. The Young Modulus of In is 11 GPa. The Speed of Sound of Element 49 is 1215 m/s.
Hardness	8.83 MPa 1.2 MPa
Bulk Modulus
Shear Modulus
Young's Modulus	11 GPa
Poisson Ratio
Speed of Sound	1,215 m/s
Classification
The CAS Group of Indium is IIIB. The IUPAC Group of In is IIIA. The Glawe Number of Element 49 is 80. The Mendeleev Number of Indium (In) is 84. The Pettifor Number of Indium is 79. The Goldschmidt Class of In is chalcophile.
Category	Post-transition metals, Poor metals
CAS Group	IIIB
IUPAC Group	IIIA
Glawe Number	80
Mendeleev Number	84
Pettifor Number	79
Geochemical Class
Goldschmidt Class	chalcophile

Other

The Dipole Polarizability of Indium is 65 plus or minus 4 a₀. In has a C6 Dispersion Coefficient (CD) of 779 a₀, and C6 Dispersion Coefficient (GB) of 643 a₀. The Allotropes of Element 49 is . The Neutron Cross Section of Indium (In) is 194. The Neutron Mass Absorption of Indium is 0.06. The Quantum Numbers of In is 2P1/2. The Space Group of Element 49 is 139 (I4/mmm).

Gas Basicity
Dipole Polarizability	65 ± 4 a₀
C6 Dispersion Coefficient	779 a₀ 643 a₀
Allotropes
Neutron Cross Section	194
Neutron Mass Absorption	0.06
Quantum Numbers	2P1/2
Space Group	139 (I4/mmm)

Isotopes of Indium

Stable Isotopes	1
Unstable Isotopes	41
Natural Isotopes	2

⁹⁶In

Mass Number	96
Neutron Number	47
Relative Atomic Mass	95.959109 ± 0.000537 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life
Spin
Quadrupole Moment
Discovery Year	2016
Parity

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
p (proton emission)

⁹⁷In

Mass Number	97
Neutron Number	48
Relative Atomic Mass	96.949125 ± 0.00043 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	36 ± 6 ms
Spin	9/2
Quadrupole Moment
Discovery Year	2011
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	2.3%
p (proton emission)

⁹⁸In

Mass Number	98
Neutron Number	49
Relative Atomic Mass	97.942129 ± 0.000327 Da
G-Factor	0
Abundance
Radioactivity	☢️ Radioactive
Half Life	30 ± 1 ms
Spin	0
Quadrupole Moment	0
Discovery Year	1994
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.13%

⁹⁹In

Mass Number	99
Neutron Number	50
Relative Atomic Mass	98.93411 ± 0.00032 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	3.11 ± 0.06 s
Spin	9/2
Quadrupole Moment
Discovery Year	1994
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.29%

¹⁰⁰In

Mass Number	100
Neutron Number	51
Relative Atomic Mass	99.931101929 ± 0.0000024 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.62 ± 0.06 s
Spin	6
Quadrupole Moment
Discovery Year	1982
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	1.66%

¹⁰¹In

Mass Number	101
Neutron Number	52
Relative Atomic Mass	100.926414025 ± 0.000012519 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	15.1 ± 1.1 s
Spin	9/2
Quadrupole Moment
Discovery Year	1988
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	1.7%

¹⁰²In

Mass Number	102
Neutron Number	53
Relative Atomic Mass	101.924105911 ± 0.000004909 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	23.3 ± 0.1 s
Spin	6
Quadrupole Moment
Discovery Year	1981
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.0093%

¹⁰³In

Mass Number	103
Neutron Number	54
Relative Atomic Mass	102.91987883 ± 0.00000964 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	60 ± 1 s
Spin	9/2
Quadrupole Moment
Discovery Year	1978
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁰⁴In

Mass Number	104
Neutron Number	55
Relative Atomic Mass	103.918214538 ± 0.0000062 Da
G-Factor	0.886 ± 0.004
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.8 ± 0.03 m
Spin	5
Quadrupole Moment	0.63 ± 0.1
Discovery Year	1977
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁰⁵In

Mass Number	105
Neutron Number	56
Relative Atomic Mass	104.914502322 ± 0.000011 Da
G-Factor	1.2593333333333 ± 0.0011111111111111
Abundance
Radioactivity	☢️ Radioactive
Half Life	5.07 ± 0.07 m
Spin	9/2
Quadrupole Moment	0.79 ± 0.05
Discovery Year	1975
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁰⁶In

Mass Number	106
Neutron Number	57
Relative Atomic Mass	105.913463596 ± 0.000013125 Da
G-Factor	0.70114285714286 ± 0.001
Abundance
Radioactivity	☢️ Radioactive
Half Life	6.2 ± 0.1 m
Spin	7
Quadrupole Moment	0.92 ± 0.06
Discovery Year	1962
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁰⁷In

Mass Number	107
Neutron Number	58
Relative Atomic Mass	106.910287497 ± 0.000010363 Da
G-Factor	1.2393333333333 ± 0.0017777777777778
Abundance
Radioactivity	☢️ Radioactive
Half Life	32.4 ± 0.3 m
Spin	9/2
Quadrupole Moment	0.77 ± 0.05
Discovery Year	1949
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁰⁸In

Mass Number	108
Neutron Number	59
Relative Atomic Mass	107.909693654 ± 0.000009276 Da
G-Factor	0.65057142857143 ± 0.00042857142857143
Abundance
Radioactivity	☢️ Radioactive
Half Life	58 ± 1.2 m
Spin	7
Quadrupole Moment	0.957 ± 0.007
Discovery Year	1949
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁰⁹In

Mass Number	109
Neutron Number	60
Relative Atomic Mass	108.907149679 ± 0.000004261 Da
G-Factor	1.2288888888889 ± 0.00088888888888889
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.159 ± 0.01 h
Spin	9/2
Quadrupole Moment	0.8 ± 0.03
Discovery Year	1948
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹⁰In

Mass Number	110
Neutron Number	61
Relative Atomic Mass	109.907170674 ± 0.000012402 Da
G-Factor	0.67228571428571 ± 0.0011428571428571
Abundance
Radioactivity	☢️ Radioactive
Half Life	4.92 ± 0.08 h
Spin	7
Quadrupole Moment	0.32 ± 0.02
Discovery Year	1939
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹¹¹In

Mass Number	111
Neutron Number	62
Relative Atomic Mass	110.905107236 ± 0.000003675 Da
G-Factor	1.2211111111111 ± 0.0015555555555556
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.8048 ± 0.0001 d
Spin	9/2
Quadrupole Moment	0.76 ± 0.02
Discovery Year	1947
Parity	+

Decay Mode	Intensity
ϵ (electron capture)	100%

¹¹²In

Mass Number	112
Neutron Number	63
Relative Atomic Mass	111.905538718 ± 0.000004563 Da
G-Factor	2.82 ± 0.03
Abundance
Radioactivity	☢️ Radioactive
Half Life	14.88 ± 0.15 m
Spin	1
Quadrupole Moment	0.082 ± 0.005
Discovery Year	1947
Parity	+

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	62%
β⁻ (β⁻ decay)	38%

¹¹³In

Mass Number	113
Neutron Number	64
Relative Atomic Mass	112.904060451 ± 0.000000202 Da
G-Factor	1.2268444444444 ± 0.000088888888888889
Abundance	4.281 ± 0.052
Radioactivity	Stable
Half Life	Not Radioactive ☢️
Spin	9/2
Quadrupole Moment
Discovery Year	1934
Parity	+

¹¹⁴In

Mass Number	114
Neutron Number	65
Relative Atomic Mass	113.904916405 ± 0.000000323 Da
G-Factor	2.813 ± 0.014
Abundance
Radioactivity	☢️ Radioactive
Half Life	71.9 ± 0.1 s
Spin	1
Quadrupole Moment
Discovery Year	1937
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	99.5%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0.5%

¹¹⁵In

Mass Number	115
Neutron Number	66
Relative Atomic Mass	114.903878772 ± 0.000000012 Da
G-Factor	1.2294666666667 ± 0.000088888888888889
Abundance	95.719 ± 0.052
Radioactivity	☢️ Radioactive
Half Life	441 ± 25 Ty
Spin	9/2
Quadrupole Moment
Discovery Year	1924
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹¹⁶In

Mass Number	116
Neutron Number	67
Relative Atomic Mass	115.905259992 ± 0.000000236 Da
G-Factor	2.7826 ± 0.0008
Abundance
Radioactivity	☢️ Radioactive
Half Life	14.1 ± 0.03 s
Spin	1
Quadrupole Moment
Discovery Year	1937
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
ϵ (electron capture)	0.0237%

¹¹⁷In

Mass Number	117
Neutron Number	68
Relative Atomic Mass	116.904515729 ± 0.000005239 Da
G-Factor	1.2246666666667 ± 0.00088888888888889
Abundance
Radioactivity	☢️ Radioactive
Half Life	43.2 ± 0.3 m
Spin	9/2
Quadrupole Moment	0.79 ± 0.01
Discovery Year	1937
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹¹⁸In

Mass Number	118
Neutron Number	69
Relative Atomic Mass	117.906356705 ± 0.000008322 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	5 ± 0.5 s
Spin	1
Quadrupole Moment
Discovery Year	1949
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹¹⁹In

Mass Number	119
Neutron Number	70
Relative Atomic Mass	118.905851622 ± 0.000007847 Da
G-Factor	1.2237777777778 ± 0.0022222222222222
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.4 ± 0.1 m
Spin	9/2
Quadrupole Moment	0.814 ± 0.007
Discovery Year	1949
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²⁰In

Mass Number	120
Neutron Number	71
Relative Atomic Mass	119.907967489 ± 0.000042953 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	3.08 ± 0.08 s
Spin	1
Quadrupole Moment
Discovery Year	1958
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²¹In

Mass Number	121
Neutron Number	72
Relative Atomic Mass	120.907852778 ± 0.000029435 Da
G-Factor	1.2208888888889 ± 0.0011111111111111
Abundance
Radioactivity	☢️ Radioactive
Half Life	23.1 ± 0.6 s
Spin	9/2
Quadrupole Moment	0.776 ± 0.01
Discovery Year	1960
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²²In

Mass Number	122
Neutron Number	73
Relative Atomic Mass	121.910282458 ± 0.000053741 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.5 ± 0.3 s
Spin	1
Quadrupole Moment
Discovery Year	1963
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²³In

Mass Number	123
Neutron Number	74
Relative Atomic Mass	122.910435252 ± 0.00002129 Da
G-Factor	1.2184444444444 ± 0.0015555555555556
Abundance
Radioactivity	☢️ Radioactive
Half Life	6.17 ± 0.05 s
Spin	9/2
Quadrupole Moment	0.722 ± 0.009
Discovery Year	1960
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²⁴In

Mass Number	124
Neutron Number	75
Relative Atomic Mass	123.913184873 ± 0.000032808 Da
G-Factor	1.3456666666667 ± 0.0036666666666667
Abundance
Radioactivity	☢️ Radioactive
Half Life	3.12 ± 0.09 s
Spin	3
Quadrupole Moment	0.58 ± 0.07
Discovery Year	1964
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²⁵In

Mass Number	125
Neutron Number	76
Relative Atomic Mass	124.913673841 ± 0.0000019 Da
G-Factor	1.2208888888889 ± 0.002
Abundance
Radioactivity	☢️ Radioactive
Half Life	2.36 ± 0.04 s
Spin	9/2
Quadrupole Moment	0.68 ± 0.03
Discovery Year	1967
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²⁶In

Mass Number	126
Neutron Number	77
Relative Atomic Mass	125.916468202 ± 0.0000045 Da
G-Factor	1.3426666666667 ± 0.0036666666666667
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.53 ± 0.01 s
Spin	3
Quadrupole Moment	0.47 ± 0.05
Discovery Year	1974
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹²⁷In

Mass Number	127
Neutron Number	78
Relative Atomic Mass	126.91746604 ± 0.000010736 Da
G-Factor	1.2253333333333 ± 0.0017777777777778
Abundance
Radioactivity	☢️ Radioactive
Half Life	1.086 ± 0.007 s
Spin	9/2
Quadrupole Moment	0.56 ± 0.03
Discovery Year	1975
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.03%

¹²⁸In

Mass Number	128
Neutron Number	79
Relative Atomic Mass	127.920353637 ± 0.000001419 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	816 ± 27 ms
Spin	3
Quadrupole Moment
Discovery Year	1975
Parity

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.038%

¹²⁹In

Mass Number	129
Neutron Number	80
Relative Atomic Mass	128.921808534 ± 0.000002116 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	570 ± 10 ms
Spin	9/2
Quadrupole Moment
Discovery Year	1975
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.23%

¹³⁰In

Mass Number	130
Neutron Number	81
Relative Atomic Mass	129.924952257 ± 0.000001921 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	273 ± 5 ms
Spin	1
Quadrupole Moment
Discovery Year	1973
Parity

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	0.93%

¹³¹In

Mass Number	131
Neutron Number	82
Relative Atomic Mass	130.926972839 ± 0.000002367 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	261.5 ± 2.8 ms
Spin	9/2
Quadrupole Moment
Discovery Year	1976
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	2.25%

¹³²In

Mass Number	132
Neutron Number	83
Relative Atomic Mass	131.932998444 ± 0.000064447 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	202.2 ± 0.2 ms
Spin	7
Quadrupole Moment
Discovery Year	1973
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	12.3%
2n (2-neutron emission)

¹³³In

Mass Number	133
Neutron Number	84
Relative Atomic Mass	132.938067 ± 0.000215 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	163 ± 1.6 ms
Spin	9/2
Quadrupole Moment
Discovery Year	1996
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	90%
2n (2-neutron emission)

¹³⁴In

Mass Number	134
Neutron Number	85
Relative Atomic Mass	133.944208 ± 0.000215 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	136 ± 4 ms
Spin	7
Quadrupole Moment
Discovery Year	1996
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	65%
2n (2-neutron emission)	4%

¹³⁵In

Mass Number	135
Neutron Number	86
Relative Atomic Mass	134.949425 ± 0.000322 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	103 ± 3 ms
Spin	9/2
Quadrupole Moment
Discovery Year	2002
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹³⁶In

Mass Number	136
Neutron Number	87
Relative Atomic Mass	135.956017 ± 0.000322 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	86 ± 9 ms
Spin	7
Quadrupole Moment
Discovery Year	2015
Parity	-

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

¹³⁷In

Mass Number	137
Neutron Number	88
Relative Atomic Mass	136.961535 ± 0.000429 Da
G-Factor
Abundance
Radioactivity	☢️ Radioactive
Half Life	70 ± 40 ms
Spin	9/2
Quadrupole Moment
Discovery Year	2015
Parity	+

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)
2n (2-neutron emission)

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. From the brilliant indigo line in its spectrum

Discoverers	Ferdinand Reich, T. Richter
Discovery Location	Germany
Discovery Year	1863
Etymology (Name Origin)	Latin: indicum (color indigo), the color it shows in a spectroscope.
Pronunciation	IN-di-em (English)

Indium is considered to be of low toxicity

When it is bent, indium emits a high-pitched 'cry'

Uses

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. Used to coat high speed bearings and as an alloy that lowers the melting point of other metals. Relativly small amounts are used in dental items and in electronic semiconductors.

Sources

Found in certain zinc ores.

Abundance
Abundance in Earth's crust	0.25 mg/kg
Natural Abundance (Oceans)	0.02 mg/L
Natural Abundance (Human Body)
Natural Abundance (Meteor)	0.0000044 %
Natural Abundance (Sun)	0.0000004 %
Abundance in Universe	0.00000003 %

Nuclear Screening Constants

1	s	0.9903
2	p	4.102
2	s	12.8764
3	d	14.3218
3	p	17.4793
3	s	17.3692
4	d	32.0584
4	p	28.6312
4	s	27.2388
5	p	40.53
5	s	39.4885

Also Known As

In
element 49
49In

Translations

Norwegian Bokmålindium
Frenchindium
GermanIndium
Italianindio
Dutchindium
Norwegian Nynorskindium
Swedishindium
Danishindium
Hungarianindium
Afrikaansindium
Amharicኢንዲየም
AragoneseIndio
Arabicإنديوم
Azerbaijaniİndium
BelarusianІндый
Bulgarianиндий
Banglaইন্ডিয়াম
BretonIndiom
Bosnianindij
Catalanindi
CorsicanIndiu
Czechindium
ChuvashИнди
WelshIndiwm
Greekίνδιο
Esperantoindio
Spanishindio
Estonianindium
Basqueindio
Persianایندیم
Finnishindium
FriulianIndi
IrishIndiam
GalicianIndio
ManxIndjum
Hakka Chineseindium
Hebrewאינדיום
Hindiइण्डियम
Fiji HindiIndium
Croatianindij
Haitian CreoleEndyòm
Armenianինդիում
Interlinguaindium
Indonesianindium
Idoindio
Icelandicindín
Japaneseインジウム
Lojbanblajinme
JavaneseIndium
Georgianინდიუმი
KazakhИндий
Korean인듐
KurdishÎndiyûm
KomiИндий
Latinindium
LuxembourgishIndium
LimburgishIndium
LigurianIndio
Lithuanianindis
Latvianindijs
MacedonianИндиум
Malayalamഇൻഡിയം
Marathiइंडियम
Western MariИндий
MalayIndium
OccitanIndi
Polishind
Western Panjabiانڈیم
Portugueseíndio
QuechuaIndyu
Romanianindiu
Russianиндий
Sicilianinniu
Serbo-CroatianIndijum
Slovakindium
Slovenianindij
AlbanianIndiumi
Serbianиндијум
Saterland FrisianIndium
SwahiliIndi
Tamilஇண்டியம்
Thaiอินเดียม
Turkishindiyum
Ukrainianіндій
UzbekIndiy
VepsIndii
Vietnameseindi
WarayIndyo
KalmykИндиум
Yiddishאינדיום
YorubaIndium
Chinese铟
English (Canada)Indium
English (United Kingdom)indium
Portuguese (Brazil)índio
Cantonese銦
Punjabiਇੰਡੀਅਮ
Central Kurdishئیندیۆم
Gujaratiઈંડિયમ
Odiaଇଣ୍ଡିଅମ
TatarИндий
PiedmonteseIndio
Scotsindium
Belarusian (Taraskievica orthography)інд
Kannadaಇಂಡಿಯಮ್
Low GermanIndium
Newariइन्डियम
AromanianIndiu
KyrgyzИндий
Teluguఇండియం
Malteseindju
LombardIndio
Scottish GaelicIndium
Nepaliइण्डियम
Sanskritइण्डियम
Paliइन्डियम
cdoIndium
Min Nan ChineseIndium
AsturianIndiu
Maithiliइण्डियम
Bhojpuriइंडियम
Mongolianинди
Tibetanམཐིང་ལྕགས།
Tajikиндиум
Literary Chinese銦
kbpƐndɩyɔm
TagalogIndiyo
Northern FrisianIndium
oloIndii
Lingua Franca Novaindio
Wu Chinese铟
Chinese (Traditional)銦
Chinese (Taiwan)銦
Uyghurئىندىي
Chinese (Simplified)铟
Burmeseအိန္ဒီယမ်
SardinianÌndiu
BashkirИндий
Moroccan Arabicإينديوم
Egyptian Arabicانديوم
Pashtoانډيوم
CornishIndiom
Manipuriꯏꯟꯗꯤꯌꯝ
BalineseIndium
BikolIndyo (elemento)
Skolt Samiindium
Northern Samiindium
Inari Samiindium
Urduانڈیئم

Indium on ChemicalAid

AEDA subject keyword ID	17553
Art & Architecture Thesaurus ID	300386618
Australian Educational Vocabulary ID	scot/3531
Bibliothèque nationale de France ID	12276862f
CAB ID	187728
CAS Registry Number	7440-74-6
CPV Supplementary	AA30
ChEBI ID	30430
ChemSpider ID	4514408
Common Procurement Vocabulary	14763000
DSSTOX compound identifier	DTXCID401323007
DSSTox substance ID	DTXSID8052485
De Agostini ID	ìndio
Den Store Danske ID	indium
DrugBank ID	11659
ECHA Substance Infocard ID	100.028.345
Encyclopedia of China ID (Second Edition)	242975
Encyclopædia Britannica Online ID	science/indium
Encyclopædia Universalis ID	indium
Freebase ID	/m/025rw28
GND ID	4161516-5
Gran Enciclopèdia Catalana ID	0188543
Great Russian Encyclopedia Online ID	2008779
HSDB ID	6972
ICSC ID	1293
InChI	InChI=1S/In
InChIKey	APFVFJFRJDLVQX-UHFFFAOYSA-N
KBpedia ID	Indium
Krugosvet article	nauka_i_tehnika/himiya/INDI.html
Library of Congress authority ID	sh85065672
MeSH descriptor ID	D007204
NALT ID	47156
NDL Authority ID	00564200
NKCR AUT ID	ph118012
National Library of Israel J9U ID	987007545811305171
National Library of Latvia ID	000310559
OmegaWiki Defined Meaning	160221
OpenAlex ID	C543292547
PSH ID	5794
Probes And Drugs ID	PD159480
PubChem CID	5359967
Quora topic ID	Indium
RxNorm ID	1362699
Store norske leksikon ID	indium
Treccani ID	indio
UNII	045A6V3VFX
USGS Thesaurus ID	1479
Wolfram Language entity code	Entity["Mineral", "Indium"]
WordNet 3.1 Synset ID	14665401-n
YSO ID	38731
ZVG number	8370

Indium (In)

Physical Properties

Chemical Properties

Other

Isotopes of Indium

96In

97In

98In

99In

100In

101In

102In

103In

104In

105In

106In

107In

108In

109In

110In

111In

112In

113In

114In

115In

116In

117In

118In

119In

120In

121In

122In

123In

124In

125In

126In

127In

128In

129In

130In

131In

132In

133In

134In

135In

136In

137In