మూస:Infobox erbium

ఇర్బియం, ₀₀Er
ఇర్బియం
Pronunciation	/ˈɜːrbiəm/ (UR-bee-əm)
Appearance	silvery white
Standard atomic weight Ar°(Er)
	167.259±0.003; 167.26±0.01 (abridged);
ఇర్బియం in the periodic table
	హోల్మియం ← ఇర్బియం → థులియం
Group	మూస:Infobox element/symbol-to-group/format
Period	period 6
Block	f-block
Electron configuration	[Xe] 4f12 6s2
Electrons per shell	2, 8, 18, 30, 8, 2
Physical properties
Phase at STP	solid
Melting point	1802 K (1529 °C, 2784 °F)
Boiling point	3141 K (2868 °C, 5194 °F)
Density (near r.t.)	9.066 g/cm3
when liquid (at m.p.)	8.86 g/cm3
Heat of fusion	19.90 kJ/mol
Heat of vaporization	280 kJ/mol
Molar heat capacity	28.12 J/(mol·K)
Atomic properties
Oxidation states	0, +1, +2, +3 (a basic oxide)
Electronegativity	Pauling scale: 1.24
Atomic radius	empirical: 176 pm
Covalent radius	189±6 pm
	Spectral lines of ఇర్బియం
Other properties
Natural occurrence	primordial
Crystal structure	hexagonal close-packed (hcp)
Speed of sound thin rod	2830 m/s (at 20 °C)
Thermal expansion	(r.t.) (poly) 12.2 µm/(m⋅K)
Thermal conductivity	14.5 W/(m⋅K)
Electrical resistivity	(r.t.) (poly) 0.860 µ Ω⋅m
Magnetic ordering	paramagnetic at 300 K
Young's modulus	69.9 GPa
Shear modulus	28.3 GPa
Bulk modulus	44.4 GPa
Poisson ratio	0.237
Vickers hardness	589 MPa
Brinell hardness	814 MPa
CAS Number	7440-52-0
History
Discovery	Carl Gustaf Mosander (1842)
Isotopes of ఇర్బియం v; e;
	Template:infobox ఇర్బియం isotopes does not exist
	Category: ఇర్బియం; view; talk; edit; \| references

References

↑ "Standard Atomic Weights: Erbium". CIAAW. 1999.
↑ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.
↑ 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.

[1] "Standard Atomic Weights: Erbium". CIAAW. 1999.

[CIAAW2021-2] Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.

[Cloke1993-3] 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.

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