Template:Infobox indium

	child table, as reused in {IB-In} v; e; h;
Main isotopes of indium

Indium, ₄₉In
Indium
Pronunciation	/ˈɪndiəm/ (IN-dee-əm)
Appearance	silvery lustrous gray
Standard atomic weight Ar°(In)
	114.818±0.001; 114.82±0.01 (abridged);
Indium in the periodic table
	cadmium ← indium → tin
Atomic number (Z)	49
Group	group 13 (boron group)
Period	period 5
Block	p-block
Electron configuration	[Kr] 4d10 5s2 5p1
Electrons per shell	2, 8, 18, 18, 3
Physical properties
Phase at STP	solid
Melting point	429.7485 K (156.5985 °C, 313.8773 °F)
Boiling point	2345 K (2072 °C, 3762 °F)
Density (at 20° C)	7.290 g/cm3
when liquid (at m.p.)	7.02 g/cm3
Triple point	429.7445 K, ~1 kPa
Heat of fusion	3.281 kJ/mol
Heat of vaporization	231.8 kJ/mol
Molar heat capacity	26.74 J/(mol·K)
Atomic properties
Oxidation states	−5, −2, −1, 0, +1, +2, +3 (an amphoteric oxide)
Electronegativity	Pauling scale: 1.78
Ionization energies	1st: 558.3 kJ/mol ; 2nd: 1820.7 kJ/mol ; 3rd: 2704 kJ/mol ; ;
Atomic radius	empirical: 167 pm
Covalent radius	142±5 pm
Van der Waals radius	193 pm
	Spectral lines of indium
Other properties
Natural occurrence	primordial
Crystal structure	body-centered tetragonal (tI2)
Lattice constants	a = 325.16 pm; c = 494.71 pm (at 20 °C)
Thermal expansion	32.2×10−6/K (at 20 °C)
Thermal conductivity	81.8 W/(m⋅K)
Electrical resistivity	83.7 nΩ⋅m (at 20 °C)
Magnetic ordering	diamagnetic
Molar magnetic susceptibility	−64.0×10−6 cm3/mol (298 K)
Young's modulus	11 GPa
Speed of sound thin rod	1215 m/s (at 20 °C)
Mohs hardness	1.2
Brinell hardness	8.8–10.0 MPa
CAS Number	7440-74-6
History
Discovery	Ferdinand Reich and Hieronymous Theodor Richter (1863)
First isolation	Hieronymous Theodor Richter (1864)
Isotopes of indium v; e;
	Category: Indium; view; talk; edit; \| references

In · Indium
Cd ← ibox Cd	^iso ₄₉In [e] IB-In [e] IBisos [e]	→ Sn ibox Sn
cat:In (8) cat:In-isotopes (43) Commons Wikidata:Q1094 Wiktionary
indexes by PT (page) v e

Data sets read by {{Infobox element}}
Name and identifiers	view edit
Symbol etymology (11 non-trivial)	view edit
Top image (caption, alt)	view edit
Pronunciation	view edit
Allotropes (overview)	view edit
Group (overview)	view edit
Period (overview)	view edit
Block (overview)	view edit
Natural occurrence	view edit
Phase at STP	view edit
Oxidation states	view edit
Spectral lines image	view edit
Electron configuration (cmt, ref)	view edit
Isotopes
Standard atomic weight	view edit
most stable isotope	view edit
Wikidata
Wikidata *	view edit
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (11) · (this table: v )

Notes

^ The thermal expansion is anisotropic: the parameters (at 20 °C) for each crystal axis are α_a = 53.2×10⁻⁶/K, α_c = −9.75×10⁻⁶/K, and α_average = α_V/3 = 32.2×10⁻⁶/K.^[3]

References

^ "Standard Atomic Weights: Indium". CIAAW. 2011.
^ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.
^ ^3.0 ^3.1 ^3.2 Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.
^ Mangum, B. W. (1989). "Determination of the Indium Freezing-point and Triple-point Temperatures". Metrologia. 26 (4): 211. Bibcode:1989Metro..26..211M. doi:10.1088/0026-1394/26/4/001.
^ Unstable In(0) carbonyls and clusters have been detected, see [1], p. 6.
^ Guloy, A. M.; Corbett, J. D. (1996). "Synthesis, Structure, and Bonding of Two Lanthanum Indium Germanides with Novel Structures and Properties". Inorganic Chemistry. 35 (9): 2616–22. doi:10.1021/ic951378e. PMID 11666477.
^ Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.
^ Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.
^ ^9.0 ^9.1 Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.

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[7] The thermal expansion is anisotropic: the parameters (at 20 °C) for each crystal axis are α_a = 53.2×10⁻⁶/K, α_c = −9.75×10⁻⁶/K, and α_average = α_V/3 = 32.2×10⁻⁶/K.^[3]

[1] "Standard Atomic Weights: Indium". CIAAW. 2011.

[CIAAW2021-2] Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; Böhlke, John K.; Chesson, Lesley A.; Coplen, Tyler B.; Ding, Tiping; Dunn, Philip J. H.; Gröning, Manfred; Holden, Norman E.; Meijer, Harro A. J. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry. doi:10.1515/pac-2019-0603. ISSN 1365-3075.

[Arblaster_2018-3] 3.0 ^3.1 ^3.2 Arblaster, John W. (2018). Selected Values of the Crystallographic Properties of Elements. Materials Park, Ohio: ASM International. ISBN 978-1-62708-155-9.

[4] Mangum, B. W. (1989). "Determination of the Indium Freezing-point and Triple-point Temperatures". Metrologia. 26 (4): 211. Bibcode:1989Metro..26..211M. doi:10.1088/0026-1394/26/4/001.

[5] Unstable In(0) carbonyls and clusters have been detected, see [1], p. 6.

[6] Guloy, A. M.; Corbett, J. D. (1996). "Synthesis, Structure, and Bonding of Two Lanthanum Indium Germanides with Novel Structures and Properties". Inorganic Chemistry. 35 (9): 2616–22. doi:10.1021/ic951378e. PMID 11666477.

[8] Lide, D. R., ed. (2005). "Magnetic susceptibility of the elements and inorganic compounds". CRC Handbook of Chemistry and Physics (PDF) (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

[9] Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

[NUBASE2020-10] 9.0 ^9.1 Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.

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