Template:Infobox iridium

	child table, as reused in {IB-Ir} v; e; h;
Main isotopes of iridium
ε	192Os

Iridium, ₇₇Ir
Iridium
Pronunciation	/ɪˈrɪdiəm/ (i-RID-ee-əm)
Appearance	Silvery white
Standard atomic weight Ar°(Ir)
	192.217±0.002; 192.22±0.01 (abridged);
Iridium in the periodic table
	osmium ← iridium → platinum
Atomic number (Z)	77
Group	group 9
Period	period 6
Block	d-block
Electron configuration	[Xe] 4f14 5d7 6s2
Electrons per shell	2, 8, 18, 32, 15, 2
Physical properties
Phase at STP	solid
Melting point	2719 K (2446 °C, 4435 °F)
Boiling point	4403 K (4130 °C, 7466 °F)
Density (at 20° C)	22.562 g/cm3
when liquid (at m.p.)	19 g/cm3
Heat of fusion	41.12 kJ/mol
Heat of vaporization	564 kJ/mol
Molar heat capacity	25.10 J/(mol·K)
Atomic properties
Oxidation states	−3, –2, −1, 0, +1, +2, +3, +4, +5, +6, +7, +8, +9
Electronegativity	Pauling scale: 2.20
Ionization energies	1st: 880 kJ/mol ; 2nd: 1600 kJ/mol ; ;
Atomic radius	empirical: 136 pm
Covalent radius	141±6 pm
	Spectral lines of iridium
Other properties
Natural occurrence	primordial
Crystal structure	face-centered cubic (fcc) (cF4)
Lattice constant	a = 383.92 pm (at 20 °C)
Thermal expansion	6.47×10−6/K (at 20 °C)
Thermal conductivity	147 W/(m⋅K)
Electrical resistivity	47.1 nΩ⋅m (at 20 °C)
Magnetic ordering	paramagnetic
Molar magnetic susceptibility	+25.6 × 10−6 cm3/mol (298 K)
Young's modulus	528 GPa
Shear modulus	210 GPa
Bulk modulus	320 GPa
Speed of sound thin rod	4825 m/s (at 20 °C)
Poisson ratio	0.26
Mohs hardness	6.5
Vickers hardness	1760–2200 MPa
Brinell hardness	1670 MPa
CAS Number	7439-88-5
History
Discovery and first isolation	Smithson Tennant (1803)
Isotopes of iridium v; e;
ε	192Os
	Category: Iridium; view; talk; edit; \| references

Ir · Iridium
Os ← ibox Os	^iso ₇₇Ir [e] IB-Ir [e] IBisos [e]	→ Pt ibox Pt
cat:Ir (10) cat:Ir-isotopes (44) Commons Wikidata:Q877 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 (12) · (this table: v )

References

^ "Standard Atomic Weights: Iridium". CIAAW. 2017.
^ 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.
^ Wang, Guanjun; Zhou, Mingfei; Goettel, James T.; Schrobilgen, Gary G.; Su, Jing; Li, Jun; Schlöder, Tobias; Riedel, Sebastian (2014). "Identification of an iridium-containing compound with a formal oxidation state of IX". Nature. 514 (7523): 475–477. Bibcode:2014Natur.514..475W. doi:10.1038/nature13795. PMID 25341786. S2CID 4463905.
^ 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.
^ ^7.0 ^7.1 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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[1] "Standard Atomic Weights: Iridium". CIAAW. 2017.

[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.

[IrIX-4] Wang, Guanjun; Zhou, Mingfei; Goettel, James T.; Schrobilgen, Gary G.; Su, Jing; Li, Jun; Schlöder, Tobias; Riedel, Sebastian (2014). "Identification of an iridium-containing compound with a formal oxidation state of IX". Nature. 514 (7523): 475–477. Bibcode:2014Natur.514..475W. doi:10.1038/nature13795. PMID 25341786. S2CID 4463905.

[5] 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.

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

[NUBASE2020-7] 7.0 ^7.1 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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