Template:Infobox europium

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

Europium, 63Eu
Europium.jpg
Europium
Pronunciation/jʊəˈrpiəm/ (Template:Respell)
Appearancesilvery white, with a pale yellow tint;[1] but rarely seen without oxide discoloration
Standard atomic weight Ar, std(Eu)Template:Val[2]
Europium in the periodic table
Template:Periodic table (32 columns, micro)

Eu

Am
samariumeuropiumgadolinium
Atomic number (Z)63
Groupgroup n/a
Periodperiod 6
Block  f-block
Electron configuration[Xe] 4f7 6s2
Electrons per shell2, 8, 18, 25, 8, 2
Physical properties
Phase at STPsolid
Melting point1099 K ​(826 °C, ​1519 °F)
Boiling point1802 K ​(1529 °C, ​2784 °F)
Density (near r.t.)5.264 g/cm3
when liquid (at m.p.)5.13 g/cm3
Heat of fusion9.21 kJ/mol
Heat of vaporization176 kJ/mol
Molar heat capacity27.66 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 863 957 1072 1234 1452 1796
Atomic properties
Oxidation states0,[3] +2, +3 (a mildly basic oxide)
ElectronegativityPauling scale: 1.2
Ionization energies
  • 1st: 547.1 kJ/mol
  • 2nd: 1085 kJ/mol
  • 3rd: 2404 kJ/mol
Atomic radiusempirical: 180 pm
Covalent radius198±6 pm
Color lines in a spectral range
Spectral lines of europium
Other properties
Natural occurrenceprimordial
Crystal structurebody-centered cubic (bcc)
Body-centered cubic crystal structure for europium
Thermal expansionpoly: 35.0 µm/(m·K) (at r.t.)
Thermal conductivityest. 13.9 W/(m·K)
Electrical resistivitypoly: 0.900 µΩ·m (at r.t.)
Magnetic orderingparamagnetic[4]
Magnetic susceptibility+34,000.0·10−6 cm3/mol[5]
Young's modulus18.2 GPa
Shear modulus7.9 GPa
Bulk modulus8.3 GPa
Poisson ratio0.152
Vickers hardness165–200 MPa
CAS Number7440-53-1
History
Namingafter Europe
Discovery and first isolationEugène-Anatole Demarçay (1896, 1901)
Main isotopes of europium
[[Isotope|IsoTemplate:Shytope]] [[Natural abundance|AbunTemplate:Shydance]] Half-life (t1/2) Decay mode [[Decay product|ProTemplate:Shyduct]]
150Eu syn 36.9 y ε 150Sm
151Eu 47.8% 5×1018 y α 147Pm
152Eu syn 13.54 y ε 152Sm
β 152Gd
153Eu 52.2% stable
154Eu syn 8.59 y β 154Gd
155Eu syn 4.76 y β 155Gd
Category Category: Europium
| references

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

data m.p. cat
in calc from C diff report ref
C 826
K 1099 1099 0
F 1519 1519 0 Template:Subpage other
max precision 0
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input C: 826, K: 1099, F: 1519
comment
data b.p. cat
in calc from C diff report ref
C 1529
K 1802 1802 0
F 2784 2784 0 Template:Subpage other
max precision 0
WD Template:Wikidata Script error: No such module "EditAtWikidata". Template:Wikidata
input C: 1529, K: 1802, F: 2784
comment
Sm ←

i'box Sm

iso
63
Eu (E)
→ Gd

i'box Gd

  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. Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. p. 112. ISBN 978-0-08-037941-8.
  2. 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.
  3. Yttrium and all lanthanides except Ce and Pm have been observed in the oxidation state 0 in bis(1,3,5-tri-t-butylbenzene) complexes, see Cloke, F. Geoffrey N. (1993). "Zero Oxidation State Compounds of Scandium, Yttrium, and the Lanthanides". Chem. Soc. Rev. 22: 17–24. doi:10.1039/CS9932200017. and Arnold, Polly L.; Petrukhina, Marina A.; Bochenkov, Vladimir E.; Shabatina, Tatyana I.; Zagorskii, Vyacheslav V.; Cloke (2003-12-15). "Arene complexation of Sm, Eu, Tm and Yb atoms: a variable temperature spectroscopic investigation". Journal of Organometallic Chemistry. 688 (1–2): 49–55. doi:10.1016/j.jorganchem.2003.08.028.
  4. 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.
  5. Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.

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