Template:Infobox iridium

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[[Category:Template:Pagetype with short description]]

Iridium, 77Ir
Pieces of pure iridium
Iridium
Pronunciation/ɪˈrɪdiəm/ (Template:Respell)
Appearancesilvery white
Standard atomic weight Ar, std(Ir)Template:Val[1]
Iridium in the periodic table
Template:Periodic table (32 columns, micro) Rh

Ir

Mt
osmiumiridiumplatinum
Atomic number (Z)77
Groupgroup 9
Periodperiod 6
Block  d-block
Electron configuration[Xe] 4f14 5d7 6s2
Electrons per shell2, 8, 18, 32, 15, 2
Physical properties
Phase at STPsolid
Melting point2739 K ​(2466 °C, ​4471 °F)
Boiling point4701 K ​(4428 °C, ​8002 °F)
Density (near r.t.)22.56 [2] g/cm3
when liquid (at m.p.)19 g/cm3
Heat of fusion41.12 kJ/mol
Heat of vaporization563 kJ/mol
Molar heat capacity25.10 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2713 2957 3252 3614 4069 4659
Atomic properties
Oxidation states−3, −1, 0, +1, +2, +3, +4, +5, +6, +7, +8, +9[3]
ElectronegativityPauling scale: 2.20
Atomic radiusempirical: 136 pm
Covalent radius141±6 pm
Color lines in a spectral range
Spectral lines of iridium
Other properties
Natural occurrenceprimordial
Crystal structureface-centered cubic (fcc)
Face-centered cubic crystal structure for iridium
Speed of sound thin rod4825 m/s (at 20 °C)
Thermal expansion6.4 µm/(m·K)
Thermal conductivity147 W/(m·K)
Electrical resistivity47.1 n Ω·m (at 20 °C)
Magnetic orderingparamagnetic[4]
Young's modulus528 GPa
Shear modulus210 GPa
Bulk modulus320 GPa
Poisson ratio0.26
Mohs hardness6.5
Vickers hardness1760 MPa
Brinell hardness1670 MPa
CAS Number7439-88-5
Main isotopes of iridium
[[Isotope|IsoTemplate:Shytope]] [[Natural abundance|AbunTemplate:Shydance]] Half-life (t1/2) Decay mode [[Decay product|ProTemplate:Shyduct]]
188Ir syn 1.73 d ε 188Os
189Ir syn 13.2 d ε 189Os
190Ir syn 11.8 d ε 190Os
191Ir 37.3% stable
192Ir syn 73.827 d β 192Pt
ε 192Os
192m2Ir syn 241 y IT 192Ir
193Ir 62.7% stable
193mIr syn 10.5 d IT 193Ir
194Ir syn 19.3 h β 194Pt
194m2Ir syn 171 d IT 194Ir
Category Category: Iridium
| references

[[Category:Infobox templates|Template:Remove first word]]

data m.p. cat
in calc from C diff report ref
C 2466
K 2739 2739 0
F 4471 4471 0 Template:Subpage other
max precision 0
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input C: 2466, K: 2739, F: 4471
comment
data b.p. cat
in calc from C diff report ref
C 4428
K 4701 4701 0
F 8002 8002 0 Template:Subpage other
max precision 0
WD Template:Wikidata Script error: No such module "EditAtWikidata". Template:Wikidata
input C: 4428, K: 4701, F: 8002
comment

References

  1. Meija, Juris; et al. (2016). "Atomic weights of the elements 2013 (IUPAC Technical Report)". Pure and Applied Chemistry. 88 (3): 265–91. doi:10.1515/pac-2015-0305.
  2. J. W. Arblaster: Densities of Osmium and Iridium, in: Platinum Metals Review, 1989, 33, 1, S. 14–16; Volltext.
  3. 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.
  4. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.