Template:Infobox osmium

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

Osmium, 76Os
Osmium crystals.jpg
Osmium
Pronunciation/ˈɒzmiəm/ (Template:Respell)
Appearancesilvery, blue cast
Standard atomic weight Ar, std(Os)Template:Val[1]
Osmium in the periodic table
Template:Periodic table (32 columns, micro) Ru

Os

Hs
rheniumosmiumiridium
Atomic number (Z)76
Groupgroup 8
Periodperiod 6
Block  d-block
Electron configuration[Xe] 4f14 5d6 6s2
Electrons per shell2, 8, 18, 32, 14, 2
Physical properties
Phase at STPsolid
Melting point3306 K ​(3033 °C, ​5491 °F)
Boiling point5285 K ​(5012 °C, ​9054 °F)
Density (near r.t.)22.59 g/cm3
when liquid (at m.p.)20 g/cm3
Heat of fusion31 kJ/mol
Heat of vaporization378 kJ/mol
Molar heat capacity24.7 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 3160 3423 3751 4148 4638 5256
Atomic properties
Oxidation states−4, −2, −1, 0, +1, +2, +3, +4, +5, +6, +7, +8 (a mildly acidic oxide)
ElectronegativityPauling scale: 2.2
Ionization energies
  • 1st: 840 kJ/mol
  • 2nd: 1600 kJ/mol
Atomic radiusempirical: 135 pm
Covalent radius144±4 pm
Color lines in a spectral range
Spectral lines of osmium
Other properties
Natural occurrenceprimordial
Crystal structurehexagonal close-packed (hcp)
Hexagonal close packed crystal structure for osmium
Speed of sound thin rod4940 m/s (at 20 °C)
Thermal expansion5.1 µm/(m·K) (at 25 °C)
Thermal conductivity87.6 W/(m·K)
Electrical resistivity81.2 nΩ·m (at 0 °C)
Magnetic orderingparamagnetic[2]
Magnetic susceptibility11·10−6 cm3/mol[2]
Shear modulus222 GPa
Bulk modulus462 GPa
Poisson ratio0.25
Mohs hardness7.0
Vickers hardness300 MPa
Brinell hardness293 MPa
CAS Number7440-04-2
History
Discovery and first isolationSmithson Tennant (1803)
Main isotopes of osmium
[[Isotope|IsoTemplate:Shytope]] [[Natural abundance|AbunTemplate:Shydance]] Half-life (t1/2) Decay mode [[Decay product|ProTemplate:Shyduct]]
184Os 0.02% stable
185Os syn 93.6 d ε 185Re
186Os 1.59% 2.0×1015 y α 182W
187Os 1.96% stable
188Os 13.24% stable
189Os 16.15% stable
190Os 26.26% stable
191Os syn 15.4 d β 191Ir
192Os 40.78% stable
193Os syn 30.11 d β 193Ir
194Os syn 6 y β 194Ir
Category Category: Osmium
| references

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

data m.p. cat
in calc from C diff report ref
C 3033
K 3306 3306 0
F 5491 5491 0 Template:Subpage other
max precision 0
WD Template:Wikidata Script error: No such module "EditAtWikidata". Template:Wikidata
input C: 3033, K: 3306, F: 5491
comment
data b.p. cat
in calc from C diff report ref
C 5012
K 5285 5285 0
F 9054 9054 0 Template:Subpage other
max precision 0
WD Template:Wikidata Script error: No such module "EditAtWikidata". Template:Wikidata
input C: 5012, K: 5285, F: 9054
comment
Re ←

i'box Re

iso
76
Os (E)
→ Ir

i'box Ir

  Data sets read by {{Infobox element}}
Name and identifiers
Top image (caption, alt)
Pronunciation
Category (enwiki)
Standard atomic weight
  most stable isotope
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Term symbol * (cmt, ref)
Wikidata *
* Not used in {{Infobox element}} (2019-02-03)
See also {{Infobox element/symbol-to--navbox}}

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. 2.0 2.1 Haynes 2011, p. 4.134.

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