Erbium (Er)

Erbium is the 68th element in the periodic table and has a symbol of Er and atomic number of 68. It has an atomic weight of 167.259 and a mass number of 166. Erbium has sixty-eight protons and ninety-eight neutrons in its nucleus, and sixty-eight electrons in six shells. It is located in group zero, period six and block f of the periodic table. Soft silvery metallic element which belongs to the lanthanoids. Six natural isotopes that are stable. Twelve artificial isotopes are known. Used in nuclear technology as a neutron absorber. It is being investigated for other possible uses. Discovered by Carl G. Mosander in 1843.

Atomic Number	68
Atomic Weight	167.259
Mass Number	166

Group
Period	6
Block	f

Protons	68 p⁺
Neutrons	98 n⁰
Electrons	68 e^-

Properties

Physical Properties
Atomic Radius	175 pm 272 pm
Molar Volume	18.4 cm³/mol
Covalent Radius	165 pm 133 pm 189 pm
Metallic Radius
Ionic Radius	89 pm 94.5 pm 100.4 pm 106.2 pm
Crystal Radius	103 pm 108.5 pm 114.4 pm 120.2 pm
Van der Waals Radius	229 pm 267 pm 339.1 pm
Density	9.07 g/cm³ 8,860 kg/m³
Energy
Proton Affinity
Electron Affinity
Ionization Energy	6.1077 eV/particle 11.93 eV/particle 22.74 eV/particle 42.7 eV/particle 65.1 eV/particle 96 eV/particle 114 eV/particle 131 eV/particle 158 eV/particle 177 eV/particle 201 eV/particle 235 eV/particle 268 eV/particle 290 eV/particle 311 eV/particle 345 eV/particle 381 eV/particle 415 eV/particle 450 eV/particle 486 eV/particle 520 eV/particle 555 eV/particle 770 eV/particle 810 eV/particle 853 eV/particle 899 eV/particle 943 eV/particle 989 eV/particle 1,046 eV/particle 1,092 eV/particle 1,142 eV/particle 1,188 eV/particle 1,370 eV/particle 1,416 eV/particle 1,468 eV/particle 1,516 eV/particle 1,625 eV/particle 1,678 eV/particle 1,803 eV/particle 1,859 eV/particle 3,157 eV/particle 3,265 eV/particle 3,381 eV/particle 3,505 eV/particle 3,624 eV/particle 3,742 eV/particle 3,916 eV/particle 4,038 eV/particle 4,170 eV/particle 4,294 eV/particle 4,639 eV/particle 4,748 eV/particle 4,866 eV/particle 4,978 eV/particle 5,329 eV/particle 5,455 eV/particle 5,695 eV/particle 5,815 eV/particle 12,918 eV/particle 13,217 eV/particle 13,548 eV/particle 13,855 eV/particle 15,146 eV/particle 15,511 eV/particle 15,971 eV/particle 16,274.56 eV/particle 65,848.24 eV/particle 67,241.85 eV/particle

Heat of Vaporization	317 kJ/mol
Heat of Fusion
Heat of Formation	316.4 kJ/mol
Electrons
Electron Shells	2, 8, 18, 30, 8, 2

Valence Electrons	2

Electron Configuration	[Xe] 4f¹² 6s²

Oxidation States	0, 2, 3
Electronegativity	0.212261 1.24
Electrophilicity
Phases
Phase	Solid
Gas Phase
Boiling Point	3,141.15 K
Melting Point	1,802.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual
Erbium is a Silver. Er has a CPK of #ff1493, Jmol of #00e675, and MOLCAS GV of #00e675. The Appearance of Element 68 is silvery white.
Color	Silver #ff1493 #00e675 #00e675
Appearance	silvery white
Refractive Index
Thermodynamic Properties
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 (Adiabatic Index)
Electrical Properties
Type	Conductor
Electrical Conductivity	1.2 MS/m
Electrical Resistivity	0.00000086 m Ω
Superconducting Point
Magnetism
Type	paramagnetic
Magnetic Susceptibility (Mass)	0.00000377 m³/Kg
Magnetic Susceptibility (Molar)	0.000000630566 m³/mol
Magnetic Susceptibility (Volume)	0.0341788
Magnetic Ordering
Curie Point	32 K
Neel Point	82 K
Structure
The Crystal Structure of Erbium is HEX. The lattice constant of Er is 3.56 Å. The lattice angles of Element 68 are π/2, π/2, 2 π/3.
Crystal Structure	Simple Hexagonal (HEX)
Lattice Constant	3.56 Å
Lattice Angles	π/2, π/2, 2 π/3
Mechanical Properties
Erbium has a Brinell of 814 MPa, and Vickers of 589 MPa. The Bulk Modulus of Er is 44 GPa. The Shear Modulus of Element 68 is 28 GPa. The Young Modulus of Erbium (Er) is 70 GPa. The Poisson Ratio of Erbium is 0.24. The Speed of Sound of Er is 2830 m/s.
Hardness	814 MPa 589 MPa
Bulk Modulus	44 GPa
Shear Modulus	28 GPa
Young Modulus	70 GPa
Poisson Ratio	0.24
Speed of Sound	2,830 m/s
Classification
The Glawe Number of Erbium is 22. The Mendeleev Number of Er is 35. The Pettifor Number of Element 68 is 23. The Geochemical Class of Erbium (Er) is rare earth & related. The Goldschmidt Class of Erbium is litophile.
Category	Lanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number	22
Mendeleev Number	35
Pettifor Number	23
Geochemical Class	rare earth & related
Goldschmidt Class	litophile
Other
The Dipole Polarizability of Erbium is 150 plus or minus 10 a₀. Er has a C6 Dispersion Coefficient (GB) of 2150 a₀. The Allotropes of Element 68 is . The Neutron Cross Section of Erbium (Er) is 165. The Neutron Mass Absorption of Erbium is 0.036. The Quantum Numbers of Er is 3H6. The Space Group of Element 68 is 194 (P63/mmc).
Gas Basicity
Dipole Polarizability	150 ± 10 a₀
C6 Dispersion Coefficient	2,150 a₀
Allotropes
Neutron Cross Section	165
Neutron Mass Absorption	0.036
Quantum Numbers	3H6
Space Group	194 (P63/mmc)

Isotopes of Erbium

Stable Isotopes	6
Unstable Isotopes	33
Radioactive Isotopes	33

¹⁴²Er

Abundance	Radioactive ☢️
Relative Atomic Mass	141.970016 ± 0.000537 Da
Mass Number	142
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

¹⁴²Er Decay Modes

Decay Mode	Intensity
p (proton emission)	%

¹⁴³Er

Abundance	Radioactive ☢️
Relative Atomic Mass	142.966548 ± 0.000429 Da
Mass Number	143
G-Factor
Half Life
Spin	9/2
Quadrupole Moment
Discovery Year	2005
Parity	-

¹⁴³Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%
β⁺ p (β⁺-delayed proton emission)	%

¹⁴⁴Er

Abundance	Radioactive ☢️
Relative Atomic Mass	143.9607 ± 0.00021 Da
Mass Number	144
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2003
Parity	+

¹⁴⁴Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%

¹⁴⁵Er

Abundance	Radioactive ☢️
Relative Atomic Mass	144.957874 ± 0.000215 Da
Mass Number	145
G-Factor
Half Life	900 ± 200 ms
Spin	1/2
Quadrupole Moment	0
Discovery Year	1989
Parity	+

¹⁴⁵Er Decay Modes

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

¹⁴⁶Er

Abundance	Radioactive ☢️
Relative Atomic Mass	145.952418357 ± 0.000007197 Da
Mass Number	146
G-Factor	0
Half Life	1.7 ± 0.6 s
Spin	0
Quadrupole Moment	0
Discovery Year	1993
Parity	+

¹⁴⁶Er Decay Modes

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

¹⁴⁷Er

Abundance	Radioactive ☢️
Relative Atomic Mass	146.949964456 ± 0.000041 Da
Mass Number	147
G-Factor
Half Life	3.2 ± 1.2 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1992
Parity	+

¹⁴⁷Er Decay Modes

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

¹⁴⁸Er

Abundance	Radioactive ☢️
Relative Atomic Mass	147.944735026 ± 0.000011 Da
Mass Number	148
G-Factor	0
Half Life	4.6 ± 0.2 s
Spin	0
Quadrupole Moment	0
Discovery Year	1982
Parity	+

¹⁴⁸Er Decay Modes

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

¹⁴⁹Er

Abundance	Radioactive ☢️
Relative Atomic Mass	148.942306 ± 0.00003 Da
Mass Number	149
G-Factor
Half Life	4 ± 2 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1984
Parity	+

¹⁴⁹Er Decay Modes

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

¹⁵⁰Er

Abundance	Radioactive ☢️
Relative Atomic Mass	149.937915524 ± 0.000018458 Da
Mass Number	150
G-Factor	0
Half Life	18.5 ± 0.7 s
Spin	0
Quadrupole Moment	0
Discovery Year	1982
Parity	+

¹⁵⁰Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁵¹Er

Abundance	Radioactive ☢️
Relative Atomic Mass	150.937448567 ± 0.000017681 Da
Mass Number	151
G-Factor
Half Life	23.5 ± 2 s
Spin	7/2
Quadrupole Moment
Discovery Year	1970
Parity	-

¹⁵¹Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁵²Er

Abundance	Radioactive ☢️
Relative Atomic Mass	151.935050347 ± 0.000009478 Da
Mass Number	152
G-Factor	0
Half Life	10.3 ± 0.1 s
Spin	0
Quadrupole Moment	0
Discovery Year	1963
Parity	+

¹⁵²Er Decay Modes

Decay Mode	Intensity
α (α emission)	90%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	10%

¹⁵³Er

Abundance	Radioactive ☢️
Relative Atomic Mass	152.93508635 ± 0.000009967 Da
Mass Number	153
G-Factor	-0.26628571428571 ± 0.002
Half Life	37.1 ± 0.2 s
Spin	7/2
Quadrupole Moment	-0.42 ± 0.02
Discovery Year	1963
Parity	-

¹⁵³Er Decay Modes

Decay Mode	Intensity
α (α emission)	53%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	47%

¹⁵⁴Er

Abundance	Radioactive ☢️
Relative Atomic Mass	153.932790799 ± 0.000005325 Da
Mass Number	154
G-Factor	0
Half Life	3.73 ± 0.09 m
Spin	0
Quadrupole Moment	0
Discovery Year	1963
Parity	+

¹⁵⁴Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	0.47%

¹⁵⁵Er

Abundance	Radioactive ☢️
Relative Atomic Mass	154.93321571 ± 0.00000652 Da
Mass Number	155
G-Factor	-0.19028571428571 ± 0.0014285714285714
Half Life	5.3 ± 0.3 m
Spin	7/2
Quadrupole Moment	-0.27 ± 0.02
Discovery Year	1969
Parity	-

¹⁵⁵Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.978%
α (α emission)	0.022%

¹⁵⁶Er

Abundance	Radioactive ☢️
Relative Atomic Mass	155.931065926 ± 0.00002644 Da
Mass Number	156
G-Factor	0
Half Life	19.5 ± 1 m
Spin	0
Quadrupole Moment	0
Discovery Year	1967
Parity	+

¹⁵⁶Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)	1.2%

¹⁵⁷Er

Abundance	Radioactive ☢️
Relative Atomic Mass	156.931922652 ± 0.000028454 Da
Mass Number	157
G-Factor	-0.274 ± 0.002
Half Life	18.65 ± 0.1 m
Spin	3/2
Quadrupole Moment	0.92 ± 0.01
Discovery Year	1966
Parity	-

¹⁵⁷Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁵⁸Er

Abundance	Radioactive ☢️
Relative Atomic Mass	157.929893474 ± 0.000027074 Da
Mass Number	158
G-Factor	0
Half Life	2.29 ± 0.06 h
Spin	0
Quadrupole Moment	0
Discovery Year	1961
Parity	+

¹⁵⁸Er Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%

¹⁵⁹Er

Abundance	Radioactive ☢️
Relative Atomic Mass	158.93069079 ± 0.00000391 Da
Mass Number	159
G-Factor	-0.202 ± 0.0013333333333333
Half Life	36 ± 1 m
Spin	3/2
Quadrupole Moment	1.17 ± 0.01
Discovery Year	1962
Parity	-

¹⁵⁹Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁰Er

Abundance	Radioactive ☢️
Relative Atomic Mass	159.929077193 ± 0.000026029 Da
Mass Number	160
G-Factor	0
Half Life	28.58 ± 0.09 h
Spin	0
Quadrupole Moment	0
Discovery Year	1954
Parity	+

¹⁶⁰Er Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%

¹⁶¹Er

Abundance	Radioactive ☢️
Relative Atomic Mass	160.93000353 ± 0.000009419 Da
Mass Number	161
G-Factor	-0.24266666666667 ± 0.002
Half Life	3.21 ± 0.03 h
Spin	3/2
Quadrupole Moment	1.363 ± 0.008
Discovery Year	1954
Parity	-

¹⁶¹Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶²Er

Abundance	0.139 ± 0.005
Relative Atomic Mass	161.928787299 ± 0.000000811 Da
Mass Number	162
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1938
Parity	+

¹⁶²Er Decay Modes

Decay Mode	Intensity
α (α emission)	%
2β⁺ (double β⁺ decay)	%

¹⁶³Er

Abundance	Radioactive ☢️
Relative Atomic Mass	162.930039908 ± 0.000004967 Da
Mass Number	163
G-Factor	0.2224 ± 0.0016
Half Life	75 ± 0.4 m
Spin	5/2
Quadrupole Moment	2.56 ± 0.02
Discovery Year	1953
Parity	-

¹⁶³Er Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁴Er

Abundance	1.601 ± 0.003
Relative Atomic Mass	163.929207739 ± 0.000000755 Da
Mass Number	164
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1938
Parity	+

¹⁶⁴Er Decay Modes

Decay Mode	Intensity
α (α emission)	%
2β⁺ (double β⁺ decay)	%

¹⁶⁵Er

Abundance	Radioactive ☢️
Relative Atomic Mass	164.930733482 ± 0.000000985 Da
Mass Number	165
G-Factor	0.2564 ± 0.0016
Half Life	10.36 ± 0.04 h
Spin	5/2
Quadrupole Moment	2.71 ± 0.03
Discovery Year	1950
Parity	-

¹⁶⁵Er Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%

¹⁶⁶Er

Abundance	33.503 ± 0.036
Relative Atomic Mass	165.930301067 ± 0.000000358 Da
Mass Number	166
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1934
Parity	+

¹⁶⁷Er

Abundance	22.869 ± 0.009
Relative Atomic Mass	166.932056192 ± 0.000000306 Da
Mass Number	167
G-Factor	-0.16065714285714 ± 0.00011428571428571
Half Life
Spin	7/2
Quadrupole Moment	3.57 ± 0.03
Discovery Year	1934
Parity	+

¹⁶⁸Er

Abundance	26.978 ± 0.018
Relative Atomic Mass	167.932378282 ± 0.00000028 Da
Mass Number	168
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1934
Parity	+

¹⁶⁹Er

Abundance	Radioactive ☢️
Relative Atomic Mass	168.934598444 ± 0.000000326 Da
Mass Number	169
G-Factor	0.9656 ± 0.0008
Half Life	9.392 ± 0.018 d
Spin	1/2
Quadrupole Moment	0
Discovery Year	1956
Parity	-

¹⁶⁹Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁷⁰Er

Abundance	14.91 ± 0.036
Relative Atomic Mass	169.935471933 ± 0.000001488 Da
Mass Number	170
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1934
Parity	+

¹⁷⁰Er Decay Modes

Decay Mode	Intensity
2β⁻ (double β⁻ decay)	%
α (α emission)	%

¹⁷¹Er

Abundance	Radioactive ☢️
Relative Atomic Mass	170.938037372 ± 0.000001511 Da
Mass Number	171
G-Factor	0.2628 ± 0.004
Half Life	7.516 ± 0.002 h
Spin	5/2
Quadrupole Moment	2.86 ± 0.09
Discovery Year	1938
Parity	-

¹⁷¹Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁷²Er

Abundance	Radioactive ☢️
Relative Atomic Mass	171.939363461 ± 0.000004253 Da
Mass Number	172
G-Factor	0
Half Life	49.3 ± 0.5 h
Spin	0
Quadrupole Moment	0
Discovery Year	1956
Parity	+

¹⁷²Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁷³Er

Abundance	Radioactive ☢️
Relative Atomic Mass	172.9424 ± 0.00021 Da
Mass Number	173
G-Factor
Half Life	1.434 ± 0.017 m
Spin	7/2
Quadrupole Moment
Discovery Year	1972
Parity	-

¹⁷³Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁷⁴Er

Abundance	Radioactive ☢️
Relative Atomic Mass	173.94423 ± 0.00032 Da
Mass Number	174
G-Factor	0
Half Life	3.2 ± 0.2 m
Spin	0
Quadrupole Moment	0
Discovery Year	1989
Parity	+

¹⁷⁴Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁷⁵Er

Abundance	Radioactive ☢️
Relative Atomic Mass	174.94777 ± 0.00043 Da
Mass Number	175
G-Factor
Half Life	1.2 ± 0.3 m
Spin	9/2
Quadrupole Moment
Discovery Year	1996
Parity	+

¹⁷⁵Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%

¹⁷⁶Er

Abundance	Radioactive ☢️
Relative Atomic Mass	175.94994 ± 0.00043 Da
Mass Number	176
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2012
Parity	+

¹⁷⁶Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%

¹⁷⁷Er

Abundance	Radioactive ☢️
Relative Atomic Mass	176.95399 ± 0.00054 Da
Mass Number	177
G-Factor
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year	2012
Parity	-

¹⁷⁷Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%

¹⁷⁸Er

Abundance	Radioactive ☢️
Relative Atomic Mass	177.956779 ± 0.00064 Da
Mass Number	178
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2012
Parity	+

¹⁷⁸Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%

¹⁷⁹Er

Abundance	Radioactive ☢️
Relative Atomic Mass	178.961267 ± 0.000537 Da
Mass Number	179
G-Factor
Half Life
Spin	3/2
Quadrupole Moment
Discovery Year	2018
Parity	-

¹⁷⁹Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁸⁰Er

Abundance	Radioactive ☢️
Relative Atomic Mass	179.96438 ± 0.000537 Da
Mass Number	180
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2018
Parity	+

¹⁸⁰Er Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%
β⁻ n (β⁻-delayed neutron emission)	%

History

Erbium was discovered in 1843 by Swedish chemist Carl Gustaf Mosander, who detected it as an impurity in yttria. Using ammonium hydroxide he precipitated fractions of different basicity from yttria. In these fractions he found that the fraction that contained the pink color was erbium. Erbium was named after Ytterby, a town in Sweden

Discoverers	Carl Mosander
Discovery Location	Sweden
Discovery Year	1843
Etymology (Name Origin)	Named after the Swedish town, Ytterby.
Pronunciation	UR-bi-em (English)

Erbium is considered to be moderately toxic

The highest concentration of erbium in humans is in the bones

Uses

Erbium is used in photographic filters to absorb infrared light. Erbium oxide gives a pink color and has been used as a colorant in glasses and porcelain enamel glazes. It is also used in nuclear technology in neutron-absorbing control rods. Erbium is used in alloys especially with vanadium to decrease the hardness of metals. Erbium oxide is used in ceramics to obtain a pink glaze. Also a few uses in the nuclear industry and as an alloying agent for other exotic metals. For example, it increases the malleability of vanadium.

Sources

Found with other heavier rare earths in xenotime and euxerite.

Abundance
Abundance in Earth's crust	3.5 mg/kg
Abundance in Oceans	0.00000087 mg/L
Abundance in Human Body
Abundance in Meteor	0.000018 %
Abundance in Sun	0.0000001 %
Abundance in Universe	0.0000002 %

Nuclear Screening Constants

1	s	1.3263
2	p	4.346
2	s	17.7984
3	d	13.6397
3	p	20.3891
3	s	20.9231
4	d	35.7288
4	f	40.0216
4	p	32.8908
4	s	31.768
5	p	50.528
5	s	48.282
6	s	59.5238

Erbium on ChemicalAid

Australian Educational Vocabulary ID	scot/3517
Brockhaus Enzyklopädie online ID	er-30
CAS Registry Number	7440-52-0
ChEBI ID	33379
ChemSpider ID	22416
DSSTOX compound identifier	DTXCID1047659
DSSTox substance ID	DTXSID8064694
De Agostini ID	èrbio
Den Store Danske ID	erbium
ECHA Substance Infocard ID	100.028.327
Elhuyar ZTH ID	023062
Encyclopædia Britannica Online ID	science/erbium
Encyclopædia Universalis ID	erbium
Freebase ID	/m/028bg3q
GND ID	4152588-7
Great Russian Encyclopedia Online ID	4937360
InChI	InChI=1S/Er
InChIKey	UYAHIZSMUZPPFV-UHFFFAOYSA-N
KBpedia ID	Erbium
Library of Congress authority ID	sh85044573
MeSH descriptor ID	D004871
NALT ID	37808
Namuwiki ID	어븀
National Library of Israel J9U ID	987007552901505171
OmegaWiki Defined Meaning	158202
OpenAlex ID	C513967374
PubChem CID	23980
RxNorm ID	1311483
Römpp online ID	RD-05-01479
Store norske leksikon ID	erbium
Treccani ID	erbio
UNII	77B218D3YE
USGS Thesaurus ID	1447
WordNet 3.1 Synset ID	14661166-n
YSO ID	38979
ZVG number	7680

Erbium (Er)

Properties

Isotopes of Erbium

142Er

142Er Decay Modes

143Er

143Er Decay Modes

144Er

144Er Decay Modes

145Er

145Er Decay Modes

146Er

146Er Decay Modes

147Er

147Er Decay Modes

148Er

148Er Decay Modes

149Er

149Er Decay Modes

150Er

150Er Decay Modes

151Er

151Er Decay Modes

152Er

152Er Decay Modes

153Er

153Er Decay Modes

154Er

154Er Decay Modes

155Er

155Er Decay Modes

156Er

156Er Decay Modes

157Er

157Er Decay Modes

158Er

158Er Decay Modes

159Er

159Er Decay Modes

160Er

160Er Decay Modes

161Er

161Er Decay Modes

162Er

162Er Decay Modes

163Er

163Er Decay Modes

164Er

164Er Decay Modes

165Er

165Er Decay Modes

166Er

167Er

168Er

169Er

169Er Decay Modes

170Er

170Er Decay Modes

171Er

171Er Decay Modes

172Er

172Er Decay Modes

173Er

173Er Decay Modes

174Er

174Er Decay Modes

175Er

175Er Decay Modes

176Er

176Er Decay Modes

177Er

177Er Decay Modes

178Er

178Er Decay Modes

179Er

179Er Decay Modes

180Er

180Er Decay Modes