Erbium

Erbium (Er)

chemical element with atomic number 68
Atomic Number68
Atomic Weight167.259
mass number166
Group
Period6
Blockf
proton68 p+
neutron98 n0
electron68 e-
Animated Bohr model of Er (Erbium)

Āhuatanga Ōkiko

Atomic Radius
175 pm
molar volume
covalent radius
165 pm
Metallic Radius
ionic radius
89 pm
Crystal Radius
103 pm
Van der Waals radius
229 pm
density
9.07 g/cm³
Atomic Radii Of The Elements: Erbium0102030405060708090100110120130140150160170180190200210220230pmAtomic RadiusCovalent RadiusMetallic RadiusVan der Waals radius

Chemical Property

energy
proton affinity
electron affinity
ionization energy
ionization energy of Er (Erbium)
enthalpy of vaporization
317 kJ/mol
enthalpy of fusion
standard enthalpy of formation
316.4 kJ/mol
electron
electron shell2, 8, 18, 30, 8, 2
Bohr model: Er (Erbium)
valence electron2
Lewis structure: Er (Erbium)
electron configuration[Xe] 4f12 6s2
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 4f12 6s2
Enhanced Bohr model of Er (Erbium)
Orbital Diagram of Er (Erbium)
oxidation number0, 2, 3
electronegativity
1.24
Electrophilicity Index
fundamental state of matter
phase of matterSolid
gaseous state of matter
Boiling Point
3,141.15 K
Melting Point
1,802.15 K
critical pressure
critical temperature
triple point
appearance
color
Silver
appearancesilvery white
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion
0.0000122 1/K
molar heat capacity
28.12 J/(mol K)
Specific Heat Capacity
0.168 J/(g⋅K)
heat capacity ratio
electrical properties
typeConductor
electrical conductivity
1.2 MS/m
electrical resistivity
0.00000086 m Ω
superconductivity
magnetism
typeparamagnetic
magnetic susceptibility (Mass)
0.00000377 m³/Kg
magnetic susceptibility (Molar)
0.000000630566 m³/mol
magnetic susceptibility (Volume)
0.0341788
magnetic ordering
Curie temperature
32 K
Néel temperature
82 K
structure
Crystal StructureSimple Hexagonal (HEX)
lattice constant
3.56 Å
Lattice Anglesπ/2, π/2, 2 π/3
mechanical property
hardness
bulk modulus
44 GPa
shear modulus
28 GPa
Young's modulus
70 GPa
Poisson's ratio
0.24
speed of sound
2,830 m/s
classification
CategoryLanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number22
Mendeleev Number35
Pettifor Number23
Geochemical Classrare earth & related
Goldschmidt classificationlitophile

other

Gas Basicity
polarizability
150 ± 10 a₀
C6 Dispersion Coefficient
allotrope
Neutron cross section
165
Neutron Mass Absorption
0.036
quantum number3H6
space group194 (P63/mmc)

Isotopes of Erbium

Stable Isotopes3
Unstable Isotopes36
Natural Isotopes6
Isotopic Composition16633.50%16633.50%16826.98%16826.98%16722.87%16722.87%17014.91%17014.91%1641.60%1641.60%1620.14%1620.14%

142Er

mass number142
neutron number74
relative atomic mass
141.970016 ± 0.000537 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention
parity+

decay modeintensity
p (proton emission)

143Er

mass number143
neutron number75
relative atomic mass
142.966548 ± 0.000429 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin9/2
nuclear quadrupole moment
time of discovery or invention2005
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)
β+ p (β+-delayed proton emission)

144Er

mass number144
neutron number76
relative atomic mass
143.9607 ± 0.00021 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2003
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)

145Er

mass number145
neutron number77
relative atomic mass
144.957874 ± 0.000215 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
900 ± 200 ms
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1989
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)

146Er

mass number146
neutron number78
relative atomic mass
145.952418357 ± 0.000007197 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
1.7 ± 0.6 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1993
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)

147Er

mass number147
neutron number79
relative atomic mass
146.949964456 ± 0.000041 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
3.2 ± 1.2 s
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1992
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)

148Er

mass number148
neutron number80
relative atomic mass
147.944735026 ± 0.000011 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
4.6 ± 0.2 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1982
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)0.15%

149Er

mass number149
neutron number81
relative atomic mass
148.942306 ± 0.00003 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
4 ± 2 s
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1984
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
β+ p (β+-delayed proton emission)7%

150Er

mass number150
neutron number82
relative atomic mass
149.937915524 ± 0.000018458 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
18.5 ± 0.7 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1982
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

151Er

mass number151
neutron number83
relative atomic mass
150.937448567 ± 0.000017681 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
23.5 ± 2 s
spin7/2
nuclear quadrupole moment
time of discovery or invention1970
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

152Er

mass number152
neutron number84
relative atomic mass
151.935050347 ± 0.000009478 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
10.3 ± 0.1 s
spin0
nuclear quadrupole moment
0
time of discovery or invention1963
parity+

decay modeintensity
α (α emission)90%
β+ (β+ decay; β+ = ϵ + e+)10%

153Er

mass number153
neutron number85
relative atomic mass
152.93508635 ± 0.000009967 Da
g-factor
-0.26628571428571 ± 0.002
natural abundance
radioactivity☢️ radioactive element
half-life
37.1 ± 0.2 s
spin7/2
nuclear quadrupole moment
-0.42 ± 0.02
time of discovery or invention1963
parity-

decay modeintensity
α (α emission)53%
β+ (β+ decay; β+ = ϵ + e+)47%

154Er

mass number154
neutron number86
relative atomic mass
153.932790799 ± 0.000005325 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3.73 ± 0.09 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1963
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)0.47%

155Er

mass number155
neutron number87
relative atomic mass
154.93321571 ± 0.00000652 Da
g-factor
-0.19028571428571 ± 0.0014285714285714
natural abundance
radioactivity☢️ radioactive element
half-life
5.3 ± 0.3 m
spin7/2
nuclear quadrupole moment
-0.27 ± 0.02
time of discovery or invention1969
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)99.978%
α (α emission)0.022%

156Er

mass number156
neutron number88
relative atomic mass
155.931065926 ± 0.00002644 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
19.5 ± 1 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1967
parity+

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%
α (α emission)1.2%

157Er

mass number157
neutron number89
relative atomic mass
156.931922652 ± 0.000028454 Da
g-factor
-0.274 ± 0.002
natural abundance
radioactivity☢️ radioactive element
half-life
18.65 ± 0.1 m
spin3/2
nuclear quadrupole moment
0.92 ± 0.01
time of discovery or invention1966
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

158Er

mass number158
neutron number90
relative atomic mass
157.929893474 ± 0.000027074 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
2.29 ± 0.06 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1961
parity+

decay modeintensity
ϵ (electron capture)100%

159Er

mass number159
neutron number91
relative atomic mass
158.93069079 ± 0.00000391 Da
g-factor
-0.202 ± 0.0013333333333333
natural abundance
radioactivity☢️ radioactive element
half-life
36 ± 1 m
spin3/2
nuclear quadrupole moment
1.17 ± 0.01
time of discovery or invention1962
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

160Er

mass number160
neutron number92
relative atomic mass
159.929077193 ± 0.000026029 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
28.58 ± 0.09 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1954
parity+

decay modeintensity
ϵ (electron capture)100%

161Er

mass number161
neutron number93
relative atomic mass
160.93000353 ± 0.000009419 Da
g-factor
-0.24266666666667 ± 0.002
natural abundance
radioactivity☢️ radioactive element
half-life
3.21 ± 0.03 h
spin3/2
nuclear quadrupole moment
1.363 ± 0.008
time of discovery or invention1954
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

162Er

mass number162
neutron number94
relative atomic mass
161.928787299 ± 0.000000811 Da
g-factor
0
natural abundance
0.139 ± 0.005
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1938
parity+

decay modeintensity
α (α emission)
+ (double β+ decay)

163Er

mass number163
neutron number95
relative atomic mass
162.930039908 ± 0.000004967 Da
g-factor
0.2224 ± 0.0016
natural abundance
radioactivity☢️ radioactive element
half-life
75 ± 0.4 m
spin5/2
nuclear quadrupole moment
2.56 ± 0.02
time of discovery or invention1953
parity-

decay modeintensity
β+ (β+ decay; β+ = ϵ + e+)100%

164Er

mass number164
neutron number96
relative atomic mass
163.929207739 ± 0.000000755 Da
g-factor
0
natural abundance
1.601 ± 0.003
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1938
parity+

decay modeintensity
α (α emission)
+ (double β+ decay)

165Er

mass number165
neutron number97
relative atomic mass
164.930733482 ± 0.000000985 Da
g-factor
0.2564 ± 0.0016
natural abundance
radioactivity☢️ radioactive element
half-life
10.36 ± 0.04 h
spin5/2
nuclear quadrupole moment
2.71 ± 0.03
time of discovery or invention1950
parity-

decay modeintensity
ϵ (electron capture)100%

166Er

mass number166
neutron number98
relative atomic mass
165.930301067 ± 0.000000358 Da
g-factor
0
natural abundance
33.503 ± 0.036
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

167Er

mass number167
neutron number99
relative atomic mass
166.932056192 ± 0.000000306 Da
g-factor
-0.16065714285714 ± 0.00011428571428571
natural abundance
22.869 ± 0.009
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin7/2
nuclear quadrupole moment
3.57 ± 0.03
time of discovery or invention1934
parity+

168Er

mass number168
neutron number100
relative atomic mass
167.932378282 ± 0.00000028 Da
g-factor
0
natural abundance
26.978 ± 0.018
radioactivitystable isotope
half-lifeNot Radioactive ☢️
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

169Er

mass number169
neutron number101
relative atomic mass
168.934598444 ± 0.000000326 Da
g-factor
0.9656 ± 0.0008
natural abundance
radioactivity☢️ radioactive element
half-life
9.392 ± 0.018 d
spin1/2
nuclear quadrupole moment
0
time of discovery or invention1956
parity-

decay modeintensity
β (β decay)100%

170Er

mass number170
neutron number102
relative atomic mass
169.935471933 ± 0.000001488 Da
g-factor
0
natural abundance
14.91 ± 0.036
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention1934
parity+

decay modeintensity
(double β decay)
α (α emission)

171Er

mass number171
neutron number103
relative atomic mass
170.938037372 ± 0.000001511 Da
g-factor
0.2628 ± 0.004
natural abundance
radioactivity☢️ radioactive element
half-life
7.516 ± 0.002 h
spin5/2
nuclear quadrupole moment
2.86 ± 0.09
time of discovery or invention1938
parity-

decay modeintensity
β (β decay)100%

172Er

mass number172
neutron number104
relative atomic mass
171.939363461 ± 0.000004253 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
49.3 ± 0.5 h
spin0
nuclear quadrupole moment
0
time of discovery or invention1956
parity+

decay modeintensity
β (β decay)100%

173Er

mass number173
neutron number105
relative atomic mass
172.9424 ± 0.00021 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.434 ± 0.017 m
spin7/2
nuclear quadrupole moment
time of discovery or invention1972
parity-

decay modeintensity
β (β decay)100%

174Er

mass number174
neutron number106
relative atomic mass
173.94423 ± 0.00032 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
3.2 ± 0.2 m
spin0
nuclear quadrupole moment
0
time of discovery or invention1989
parity+

decay modeintensity
β (β decay)100%

175Er

mass number175
neutron number107
relative atomic mass
174.94777 ± 0.00043 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
1.2 ± 0.3 m
spin9/2
nuclear quadrupole moment
time of discovery or invention1996
parity+

decay modeintensity
β (β decay)100%

176Er

mass number176
neutron number108
relative atomic mass
175.94994 ± 0.00043 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2012
parity+

decay modeintensity
β (β decay)

177Er

mass number177
neutron number109
relative atomic mass
176.95399 ± 0.00054 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin1/2
nuclear quadrupole moment
0
time of discovery or invention2012
parity-

decay modeintensity
β (β decay)

178Er

mass number178
neutron number110
relative atomic mass
177.956779 ± 0.00064 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2012
parity+

decay modeintensity
β (β decay)

179Er

mass number179
neutron number111
relative atomic mass
178.961267 ± 0.000537 Da
g-factor
natural abundance
radioactivity☢️ radioactive element
half-life
spin3/2
nuclear quadrupole moment
time of discovery or invention2018
parity-

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)

180Er

mass number180
neutron number112
relative atomic mass
179.96438 ± 0.000537 Da
g-factor
0
natural abundance
radioactivity☢️ radioactive element
half-life
spin0
nuclear quadrupole moment
0
time of discovery or invention2018
parity+

decay modeintensity
β (β decay)
β n (β-delayed neutron emission)
Erbium

kōrero nehe

discoverer or inventorCarl Mosander
location of discoverySweden
time of discovery or invention1843
etymologyNamed after the Swedish town, Ytterby.
pronunciationUR-bi-em (Ingarihi)

source

Abundance
Abundance in Earth's crust
3.5 mg/kg
natural abundance (Moana nui)
0.00000087 mg/L
natural abundance (human body)
natural abundance (meteoroid)
0.000018 %
natural abundance (Te Rā)
0.0000001 %
Abundance in Universe
0.0000002 %

Nuclear Screening Constants

1s1.3263
2p4.346
2s17.7984
3d13.6397
3p20.3891
3s20.9231
4d35.7288
4f40.0216
4p32.8908
4s31.768
5p50.528
5s48.282
6s59.5238