Template:Infobox erbium
{{Infobox element
|symbol =Er
|Z =68
|number =68
|name =erbium
|abundance=
|abundance in earth's crust=
|abundance in oceans=
|abundance in solar system=
|left=holmium
|right=thulium
|above=–
|below=Fm
|image name=Erbium (68 Er).jpg
|image upright=0.75
|appearance=silvery white
|electrons per shell=2, 8, 18, 30, 8, 2
|phase=
|density conditions=(at 20° C)
|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
|crystal structure Pearson symbol=hP2
|lattice constants=a = 355.93 pm
c = 558.49 pm (at 20 °C){{cite book |last=Arblaster |first= John W. |title=Selected Values of the Crystallographic Properties of Elements |publisher=ASM International |publication-place=Materials Park, Ohio |date=2018 |isbn=978-1-62708-155-9}}
|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
|magnetic susceptibility= {{val|+44,300.00|e=−6}}
|magnetic susceptibility ref= {{Cite book|title=CRC, Handbook of Chemistry and Physics|last=Weast|first=Robert|publisher=Chemical Rubber Company Publishing|year=1984|isbn=0-8493-0464-4|location=Boca Raton, Florida|pages=E110}}
|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
|naming=after Ytterby (Sweden), where it was mined
|discovered by=Carl Gustaf Mosander
|discovery date=1843
|first isolation by=Wilhelm Klemm and Heinrich Bommer
|first isolation date=1934
|QID=Q1849
}}
{{Infobox element/element navigation|symbol=Er}}
{{Template reference list}}
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