फलकम्:Infobox erbium इत्येतस्य स्रोतः दृश्यताम्

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{{Infobox element
|number=68
|symbol=Er
|name=erbium
|pronounce={{IPAc-en|ˈ|ɜr|b|i|ə|m}}
|pronounce 2={{respell|UR|bee-əm}}
|left=[[holmium]]
|right=[[thulium]]
|above=–
|below=[[fermium|Fm]]
|series=lanthanide
|period=6
|block=f
|image name=Erbium-crop.jpg
|appearance=silvery white
|atomic mass=167.259
|atomic mass ref=<ref name="IUPAC">[http://www.ciaaw.org/atomic-weights.htm Standard Atomic Weights 2013]. [[Commission on Isotopic Abundances and Atomic Weights]]</ref>
|atomic mass 2=3
|atomic mass comment=
|electron configuration=&#91;[[xenon|Xe]]&#93; 4f<sup>12</sup> 6s<sup>2</sup>
|electrons per shell=2, 8, 18, 30, 8, 2
|phase=solid
|density gpcm3nrt=9.066
|density gpcm3mp=8.86
|melting point K=1802
|melting point C=1529
|melting point F=2784
|boiling point K=3141
|boiling point C=2868
|boiling point F=5194
|heat fusion=19.90
|heat vaporization=280
|heat capacity=28.12
|vapor pressure 1=1504
|vapor pressure 10=1663
|vapor pressure 100=(1885)
|vapor pressure 1 k=(2163)
|vapor pressure 10 k=(2552)
|vapor pressure 100 k=(3132)
|vapor pressure comment=
|crystal structure=hexagonal close packed
|oxidation states='''3''', 2, 1
|oxidation states comment=(a&nbsp;[[base (chemistry)|basic]] oxide)
|electronegativity=1.24
|number of ionization energies=3
|ionization energy 1=589.3
|ionization energy 2=1150
|ionization energy 3=2194
|atomic radius=176
|covalent radius=189±6
|magnetic ordering= [[paramagnetic]] at 300 K
|electrical resistivity unit prefix=µ
|electrical resistivity=poly: 0.860
|electrical resistivity comment=({{abbr|r.t.|room temperature}})
|thermal conductivity=14.5
|thermal expansion=poly: 12.2
|thermal expansion comment=({{abbr|r.t.|room temperature}})
|speed of sound rod at 20=2830
|Young's modulus=69.9
|Shear modulus=28.3
|Bulk modulus=44.4
|Poisson ratio=0.237
|Vickers hardness=430–700
|Brinell hardness=600–1070
|CAS number=7440-52-0
|isotopes=
{{infobox element/isotopes decay | mn=160 | sym=Er
 | na=[[synthetic radioisotope|syn]] | hl=28.58&nbsp;h
 | dm=[[electron capture|ε]] | de=0.330 | link1=holmium-160 | pn=160 | ps=Ho}}
{{infobox element/isotopes decay2 | mn=162 | sym=Er | na=0.139% | hl=>1.4×10<sup>14</sup>&nbsp;y
 | dm1=([[alpha decay|α]]) | de1=1.6460 | link1=dysprosium-158 | pn1=158 | ps1=Dy
 | dm2= ([[double beta decay|β<sup>+</sup>β<sup>+</sup>]]) | de2=1.8445 | link2=dysprosium-162 | pn2=162 | ps2=Dy}}
{{infobox element/isotopes decay2 | mn=164 | sym=Er | na=1.601% | hl=≥2.05×10<sup>39</sup>&nbsp;y<ref>http://www.sciencedirect.com/science/article/pii/S0370269314006741</ref>
 | dm1=(α) | de1=1.3041 | link1=dysprosium-160 | pn1=160 | ps1=Dy
 | dm2= (β<sup>+</sup>β<sup>+</sup>) | de2=0.0241 | link2=dysprosium-164 | pn2=164 | ps2=Dy}}
{{infobox element/isotopes decay | mn=165 | sym=Er
 | na=syn | hl=10.36&nbsp;h
 | dm=ε | de=0.376 | link1=holmium-165 | pn=165 | ps=Ho}}
{{infobox element/isotopes decay | mn=166 | sym=Er | na=33.503% | hl=– | dm=(α) | de=0.8309 | pn=162 | ps=Dy }}
{{infobox element/isotopes decay | mn=167 | sym=Er | na=22.869% | hl=– | dm=(α) | de=0.6657 | link1=dysprosium-163 | pn=163 | ps=Dy }}
{{infobox element/isotopes decay| mn=168 | sym=Er | na=26.978% | hl=– | dm=(α) | de=0.5527 | pn=164 | ps=Dy }}
{{infobox element/isotopes decay | mn=169 | sym=Er
 | na=syn | hl=9.4&nbsp;d
 | dm=[[beta emission|β<sup>−</sup>]] | de=0.351 | link1=thulium-169 | pn=169 | ps=Tm}}
{{infobox element/isotopes decay2 | mn=170 | sym=Er | na=14.910% | hl=>3.2×10<sup>17</sup>&nbsp;y | dm1=(α) | de1=0.0502 | link1=dysprosium-166 | pn1=166 | ps1=Dy | dm2=([[double beta decay|β<sup>−</sup>β<sup>−</sup>]]) | de2=0.6536 | link2=ytterbium-170 | pn2=170 | ps2=Yb}}
{{infobox element/isotopes decay | mn=171 | sym=Er
 | na=syn | hl=7.516&nbsp;h
 | dm=β<sup>−</sup> | de=1.490 | link1=thulium-171 | pn=171 | ps=Tm}}
{{infobox element/isotopes decay | mn=172 | sym=Er
 | na=syn | hl=49.3&nbsp;h
 | dm=β<sup>−</sup> | de=0.891 | link1=thulium-172 | pn=172 | ps=Tm}}
|isotopes comment=Decay modes in parentheses are predicted, but have not yet been observed
|naming=after [[Ytterby]] (Sweden), where it was mined
|discovered by=[[Carl Gustaf Mosander]]
|discovery date=1842
}}<noinclude>
{{Template reference list}}
{{documentation|1=Template:Infobox element/doc}}
</noinclude>

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