68 – Erbium, Er

PERIODIC TABLE

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Elemental Tile
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Erbium
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Erbium is a silvery-white solid metal when artificially isolated and in nature, it is always found in chemical combination with other elements and as such, it is a rare earth element which is associated with several other rare elements in the mineral gadolinite from Ytterby in Sweden, where yttrium, ytterbium, and terbium were discovered. Erbium’s principal uses involve its pink-coloured Er3+ ions, which have optical fluorescent properties particularly useful in certain laser applications.

1842 by Carl G. Mosander, Sweden.

DISCOVERY

From the name of Ytterby, Sweden, where it was mined.

ETYMOLOGY

Erbium

Element

Er

Symbol

68 Atomic Number

Lanthanide

Classification

7440-52-0

CAS Number

Silver

Elemental Colour

-

Refractive Index

0.240 Poisson Ratio

18.449 cm³

Molar Volume

814.00M Pa, 8.033'6k Atm

8.033'6k Atm

Brinell Hardness

1.95 Mohs Hardness

589.00M Pa, 5.813'0k Atm

5.813'0k Atm

Vickers Hardness

2,830 m/s, Mach 8.250'7

2,830 m/s

Speed of Sound

44.00G Pa, 434.246'2k Atm

434.246'2k Atm

Bulk Modulus

28.00G Pa, 276.338'5k Atm

276.338'5k Atm

Shear Modulus

70.00G Pa, 690.846'3k Atm

690.846'3k Atm

Young Modulus

Allotropes

NONE

1,770.15 K, 1,497.00 °C

1,497.00 °C

Melting Point

3,141.15 K, 2,868.00 °C

2,868.00 °C

Boiling Point

-

Automatic Ignition

-

Flashpoint

-

Critical Temperature

-

Critical Pressure

15.000'000 W/(m K)

Thermal Conductivity

0.000'012'2 K^-1

Thermal Expansion

168.00 J/(kg K)

Specific Heat

19.900 kJ/mol

Heat Fusion

285.000 kJ/mol

Heat Vaporisation

-

Heat Combustion

32 K, -241.15 °C

-241.15 °C

Curie Point

82.00 K, -191.15 °C

-191.15 °C

Neel Point

-

Adiabatic Index

Solid

Phase

Conductor

Electrical Type

1.20M S/m

Conductivity

860.00n Ω.m

Resistivity

-

Superconducting Point

Paramagnetic

Magnetic Type

0.000'003'770'0

Mass Susceptibility

0.000'000'630'566'00

Molar Susceptibility

0.034'178'800'00

Volume Susceptibility

Material Composition

0.000'000'2 %

Universe

0.000'018 %

Meteorites

0.000'000'1 %

Sun

0.000'3 %

Earth Crust

0.000'000'000'09 %

Oceans

-

Humans

167.256'304'1

Atomic Weight

222 pm

Atomic Radius

165 pm

Covalent Radius Single Bond

133 pm

Covalent Radius Double Bond

-

Covalent Radius Triple Bond

235 pm

Van der Waals Radius

[Xe]6s²4f¹²

Electron Configuration

Hexagonal, Close Packed Single

Crystal Structure

9.066'00 g/cm³

Density as Solid

8.860'00 g/cm³

Density as Liquid

-

Density as Gas

P6₃/mmc

Space Group Name

194 Space Group Number

π/2, π/2 & 2π/3

Lattice Angles

355.88, 355.88 & 558.74 pm

Lattice Constants

3 Valence

1.24 Electronegativity

30.10 kJ/mol

Electron Affinity

Ionisation Energy

Stable

Half Life

Stable

Lifetime

4f¹² = 4, 3, +1, -1/2

Quantum Numbers

8.700'00 b σ_s

Neutron Cross Section

159.000'00 b σ_a

Neutron Mass Absorption

Stable Isotopes

Unstable Isotopes

Isotopes Overview

Isotope	Stability	Symbol	Type	Protons		Neutrons		Spin	Parity	Mass		Abundance		Mass Measure	Mass Excess		Binding Energy		Dipole Moment		Quadrupole Moment		Halflife in Years		Halflife in Seconds		A01 Decay Probability		A01 Decay Mode	A01 Decay Energy		A01 Decay Daughter	A01 Decay Link	A02 Decay Mode	A02 Decay Energy		A02 Decay Daughter	A02 Decay Link	Y01 Decay Product Yield		Y01 Decay Product Nuclide	Y02 Decay Product Yield		Y02 Decay Product Nuclide	Y03 Decay Product Yield		Y03 Decay Product Nuclide	Y04 Decay Product Yield		Y04 Decay Product Nuclide	Y05 Decay Product Yield		Y05 Decay Product Nuclide	Y06 Decay Product Yield		Y06 Decay Product Nuclide
Isotope_068_er_143_u	Unstable	¹⁴³Er	Fermion	68	p	75	n	9/2	-1	142.966'340'000'0	u	~ 0	%	~ 0	-31.354'000'000'0	MeV	7.919'7.919'7.919'7.919	MeV	-		-		6.34E-9	year	200.000	milli-seconds ( x⁻³ )	?	%	β+	9,904.000	keV	¹⁴³Ho	¹⁴³Er > [ ? % , β+ , 9,904.0 keV ] > ¹⁴³Ho						?	%	¹⁴³Nd	?	%	¹⁴²Nd	?	%	¹³⁹La
Isotope_068_er_144_u	Unstable	¹⁴⁴Er	Boson	68	p	76	n	0	1	143.960'380'000'0	u	~ 0	%	~ 0	-36.906'000'000'0	MeV	7.958'000'000'0	MeV	-		-		1.27E-8	year	400.000	milli-seconds ( x⁻³ )	?	%	β+	7,268.000	keV	¹⁴⁴Ho	¹⁴⁴Er > [ ? % , β+ , 7,268.0 keV ] > ¹⁴⁴Ho						?	%	¹⁴³Nd	?	%	¹⁴²Nd	?	%	¹³⁹La	?	%	¹⁴⁰Ce
Isotope_068_er_145_u	Unstable	¹⁴⁵Er	Fermion	68	p	77	n	1/2	1	144.957'390'000'0	u	~ 0	%	~ 0	-39.691'000'000'0	MeV	7.978'000'000'0	MeV	-		-		2.85E-8	year	900.000	milli-seconds ( x⁻³ )	100.000'000	%	β+	8,470.000	keV	¹⁴⁵Ho	¹⁴⁵Er > [ 100 % , β+ , 8,470.0 keV ] > ¹⁴⁵Ho	β+	?	keV	¹⁴⁴Dy	¹⁴⁵Er > [ , β+ , ? keV ] > ¹⁴⁴Dy	?	%	¹⁴¹Pr	?	%	¹⁴⁵Nd	?	%	¹⁴³Nd	?	%	¹⁴²Nd	?	%	¹³⁹La	?	%	¹⁴⁰Ce
Isotope_068_er_146_u	Unstable	¹⁴⁶Er	Boson	68	p	78	n	0	1	145.952'000'000'0	u	~ 0	%	~ 0	-44.712'000'000'0	MeV	8.013'000'000'0	MeV	-		-		5.39E-8	year	1.700	seconds ( x⁰ )	100.000'000	%	β+	5,834.000	keV	¹⁴⁶Ho	¹⁴⁶Er > [ 100 % , β+ , 5,834.0 keV ] > ¹⁴⁶Ho	β+p	?	keV	¹⁴⁵Dy	¹⁴⁶Er > [ , β+p , ? keV ] > ¹⁴⁵Dy	100.000'000	%	¹⁴²Nd	?	%	¹⁴¹Pr	?	%	¹⁴³Nd	?	%	¹⁴⁰Ce
Isotope_068_er_147_u	Unstable	¹⁴⁷Er	Fermion	68	p	79	n	1/2	1	146.949'490'000'0	u	~ 0	%	~ 0	-47.050'000'000'0	MeV	8.029'000'000'0	MeV	-		-		7.92E-8	year	2.500	seconds ( x⁰ )	100.000'000	%	β+	7,766.000	keV	¹⁴⁷Ho	¹⁴⁷Er > [ 100 % , β+ , 7,766.0 keV ] > ¹⁴⁷Ho	β+p	?	keV	¹⁴⁶Dy	¹⁴⁷Er > [ , β+p , ? keV ] > ¹⁴⁶Dy	100.002'200	%	¹⁴³Nd	0.050'000	%	¹⁴²Nd
Isotope_068_er_148_u	Unstable	¹⁴⁸Er	Boson	68	p	80	n	0	1	147.944'550'000'0	u	~ 0	%	~ 0	-51.651'000'000'0	MeV	8.061'000'000'0	MeV	-		-		1.46E-7	year	4.600	seconds ( x⁰ )	100.000'000	%	β+	5,342.000	keV	¹⁴⁸Ho	¹⁴⁸Er > [ 100 % , β+ , 5,342.0 keV ] > ¹⁴⁸Ho	β+p	?	keV	¹⁴⁷Dy	¹⁴⁸Er > [ , β+p , ? keV ] > ¹⁴⁷Dy	0.150'003	%	¹⁴³Nd	0.000'075	%	¹⁴²Nd	?	%	¹⁴⁰Ce
Isotope_068_er_149_u	Unstable	¹⁴⁹Er	Fermion	68	p	81	n	1/2	1	148.942'306'000'0	u	~ 0	%	~ 0	-53.741'615'000'0	MeV	8.074'955'000'0	MeV	-		-		1.27E-7	year	4.000	seconds ( x⁰ )	93.000'000	%	β+	6,924.600	keV	¹⁴⁹Ho	¹⁴⁹Er > [ 93 % , β+ , 6,924.6 keV ] > ¹⁴⁹Ho	β+p	?	keV	¹⁴⁸Dy	¹⁴⁹Er > [ , β+p , ? keV ] > ¹⁴⁸Dy	15.531'333	%	¹⁴⁵Nd	0.000'000	%	¹⁴¹Pr	?	%	¹⁴⁰Ce
Isotope_068_er_150_u	Unstable	¹⁵⁰Er	Boson	68	p	82	n	0	1	149.937'913'839'0	u	~ 0	%	~ 0	-57.832'887'000'0	MeV	8.102'206'000'0	MeV	-		-		5.86E-7	year	18.500	seconds ( x⁰ )	100.000'000	%	β+	3,092.800	keV	¹⁵⁰Ho	¹⁵⁰Er > [ 100 % , β+ , 3,092.8 keV ] > ¹⁵⁰Ho						100.032'000	%	¹⁴²Nd	?	%	¹⁵⁰Sm
Isotope_068_er_151_u	Unstable	¹⁵¹Er	Fermion	68	p	83	n	7/2	-1	150.937'448'903'0	u	~ 0	%	~ 0	-58.265'971'000'0	MeV	8.104'869'000'0	MeV	-		-		7.45E-7	year	23.500	seconds ( x⁰ )	100.000'000	%	β+	4,343.900	keV	¹⁵¹Ho	¹⁵¹Er > [ 100 % , β+ , 4,343.9 keV ] > ¹⁵¹Ho						73.632'000	%	¹⁵¹Eu	26.375'576	%	¹⁴³Nd
Isotope_068_er_152_u	Unstable	¹⁵²Er	Boson	68	p	84	n	0	1	151.935'050'389'0	u	~ 0	%	~ 0	-60.500'173'000'0	MeV	8.119'347'000'0	MeV	-		-		3.26E-7	year	10.300	seconds ( x⁰ )	90.000'000	%	α	4,934.410	keV	¹⁴⁸Dy	¹⁵²Er > [ 90 % , α , 4,934.41 keV ] > ¹⁴⁸Dy	β+	2,085.890	keV	¹⁵²Ho	¹⁵²Er > [ , β+ , 2,085.89 keV ] > ¹⁵²Ho	8.800'000	%	¹⁴⁰Ce	?	%	¹⁵²Sm
Isotope_068_er_153_u	Unstable	¹⁵³Er	Fermion	68	p	85	n	7/2	-1	152.935'063'492'0	u	~ 0	%	~ 0	-60.487'968'000'0	MeV	8.118'954'000'0	MeV	-0.934'000'000'0	nm	-0.420'000'000'0	b	1.18E-6	year	37.100	seconds ( x⁰ )	53.000'000	%	α	4,802.270	keV	¹⁴⁹Dy	¹⁵³Er > [ 53 % , α , 4,802.27 keV ] > ¹⁴⁹Dy	β+	3,509.240	keV	¹⁵³Ho	¹⁵³Er > [ , β+ , 3,509.24 keV ] > ¹⁵³Ho	47.000'000	%	¹⁵³Eu	8.855'193	%	¹⁴⁵Nd	0.000'000	%	¹⁴¹Pr
Isotope_068_er_154_u	Unstable	¹⁵⁴Er	Boson	68	p	86	n	0	1	153.932'783'081'0	u	~ 0	%	~ 0	-62.612'157'000'0	MeV	8.132'438'000'0	MeV	-		-		7.10E-6	year	223.980	seconds ( x⁰ )	100.000'000	%	β+	1,009.860	keV	¹⁵⁴Ho	¹⁵⁴Er > [ 100 % , β+ , 1,009.86 keV ] > ¹⁵⁴Ho	α	4,279.880	keV	¹⁵⁰Dy	¹⁵⁴Er > [ , α , 4,279.88 keV ] > ¹⁵⁰Dy	100.489'160	%	¹⁴²Nd	?	%	¹⁵⁰Sm	?	%	¹⁵⁴Gd
Isotope_068_er_155_u	Unstable	¹⁵⁵Er	Fermion	68	p	87	n	7/2	-1	154.933'208'949'0	u	~ 0	%	~ 0	-62.215'463'000'0	MeV	8.129'484'000'0	MeV	-0.669'000'000'0	nm	-0.270'000'000'0	b	1.01E-5	year	319.980	seconds ( x⁰ )	100.000'000	%	β+	2,802.000	keV	¹⁵⁵Ho	¹⁵⁵Er > [ 100 % , β+ , 2,802.0 keV ] > ¹⁵⁵Ho	α	4,118.220	keV	¹⁵¹Dy	¹⁵⁵Er > [ , α , 4,118.22 keV ] > ¹⁵¹Dy	100.000'000	%	¹⁵⁵Gd	0.020'768	%	¹⁵¹Eu	0.001'234	%	¹⁴³Nd
Isotope_068_er_156_u	Unstable	¹⁵⁶Er	Boson	68	p	88	n	0	1	155.931'064'698'0	u	~ 0	%	~ 0	-64.212'821'000'0	MeV	8.142'8.142'8.142'8.142	MeV	-		-		3.71E-5	year	1.170	kilo-seconds ( x³ )	100.000'000	%	β+	119.500	keV	¹⁵⁶Ho	¹⁵⁶Er > [ 100 % , β+ , 119.5 keV ] > ¹⁵⁶Ho	α	3,486.700	keV	¹⁵²Dy	¹⁵⁶Er > [ , α , 3,486.7 keV ] > ¹⁵²Dy	0.000'017	%	¹⁴⁰Ce	?	%	¹⁵²Sm	?	%	¹⁵⁶Gd
Isotope_068_er_157_u	Unstable	¹⁵⁷Er	Fermion	68	p	89	n	3/2	-1	156.931'916'000'0	u	~ 0	%	~ 0	-63.419'838'000'0	MeV	8.136'414'000'0	MeV	-0.412'000'000'0	nm	0.920'000'000'0	b	3.55E-5	year	1.119	kilo-seconds ( x³ )	100.000'000	%	β+	2,386.900	keV	¹⁵⁷Ho	¹⁵⁷Er > [ 100 % , β+ , 2,386.9 keV ] > ¹⁵⁷Ho						100.000'000	%	¹⁵⁷Gd
Isotope_068_er_158_u	Unstable	¹⁵⁸Er	Boson	68	p	90	n	0	1	157.929'893'474'0	u	~ 0	%	~ 0	-65.303'809'000'0	MeV	-65.303'809'000'0	MeV	-		-		2.61E-4	year	8.240	kilo-seconds ( x³ )	100.000'000	%	ϵ	887.200	keV	¹⁵⁸Ho	¹⁵⁸Er > [ 100 % , ϵ , 887.2 keV ] > ¹⁵⁸Ho						?	%	¹⁴²Nd	?	%	¹⁵⁴Gd	?	%	¹⁵⁰Sm	?	%	¹⁵⁸Gd
Isotope_068_er_159_u	Unstable	¹⁵⁹Er	Fermion	68	p	91	n	3/2	-1	158.930'684'066'0	u	~ 0	%	~ 0	-64.567'376'000'0	MeV	8.142'813'000'0	MeV	-0.304'000'000'0	nm	1.170'000'000'0	b	6.97E-5	year	2.200	kilo-seconds ( x³ )	100.000'000	%	β+	1,746.300	keV	¹⁵⁹Ho	¹⁵⁹Er > [ 100 % , β+ , 1,746.3 keV ] > ¹⁵⁹Ho						100.000'000	%	¹⁵⁹Tb
Isotope_068_er_160_u	Unstable	¹⁶⁰Er	Boson	68	p	92	n	0	1	159.929'083'292'0	u	~ 0	%	~ 0	-66.058'488'000'0	MeV	8.151'685'000'0	MeV	-		-		3.26E-3	year	102.902	kilo-seconds ( x³ )	100.000'000	%	ϵ	329.600	keV	¹⁶⁰Ho	¹⁶⁰Er > [ 100 % , ϵ , 329.6 keV ] > ¹⁶⁰Ho						100.000'000	%	¹⁶⁰Dy
Isotope_068_er_161_u	Unstable	¹⁶¹Er	Fermion	68	p	93	n	3/2	-1	160.929'995'309'0	u	~ 0	%	~ 0	-65.208'950'000'0	MeV	8.145'910'000'0	MeV	-0.365'000'000'0	nm	1.361'000'000'0	b	3.68E-4	year	11.599	kilo-seconds ( x³ )	100.000'000	%	β+	971.690	keV	¹⁶¹Ho	¹⁶¹Er > [ 100 % , β+ , 971.69 keV ] > ¹⁶¹Ho						100.000'000	%	¹⁶¹Dy
Isotope_068_er_162_s	Stable	¹⁶²Er	Boson	68	p	94	n	0	1	161.928'778'264'0	u	0.140'000	%	0.226'700'289'6	-66.342'600'000'0	MeV	8.152'447'000'0	MeV	-		-		-				?	%	α	1,644.570	keV	¹⁵⁸Dy	¹⁶²Er > [ ? % , α , 1,644.57 keV ] > ¹⁵⁸Dy	2β+	-200.210	keV	¹⁶²Dy	¹⁶²Er > [ , 2β+ , -200.21 keV ] > ¹⁶²Dy	?	%	¹⁵⁸Gd	?	%	¹⁵⁴Gd	?	%	¹⁶²Dy
Isotope_068_er_163_u	Unstable	¹⁶³Er	Fermion	68	p	95	n	5/2	-1	162.930'032'749'0	u	~ 0	%	~ 0	-65.174'074'000'0	MeV	8.144'780'000'0	MeV	0.557'000'000'0	nm	2.550'000'000'0	b	1.43E-4	year	4.500	kilo-seconds ( x³ )	100.000'000	%	β+	187.670	keV	¹⁶³Ho	¹⁶³Er > [ 100 % , β+ , 187.67 keV ] > ¹⁶³Ho						100.000'000	%	¹⁶³Dy
Isotope_068_er_164_s	Stable	¹⁶⁴Er	Boson	68	p	96	n	0	1	163.929'200'229'0	u	1.610'000	%	2.639'260'123'7	-65.949'562'000'0	MeV	8.149'061'000'0	MeV	-		-		-				?	%	α	1,303.590	keV	¹⁶⁰Dy	¹⁶⁴Er > [ ? % , α , 1,303.59 keV ] > ¹⁶⁰Dy	2β+	-2,020.670	keV	¹⁶⁴Dy	¹⁶⁴Er > [ , 2β+ , -2,020.67 keV ] > ¹⁶⁴Dy	?	%	¹⁶⁴Dy	?	%	¹⁶⁰Dy
Isotope_068_er_165_u	Unstable	¹⁶⁵Er	Fermion	68	p	97	n	5/2	-1	164.930'726'003'0	u	~ 0	%	~ 0	-64.528'312'000'0	MeV	8.139'976'000'0	MeV	0.643'000'000'0	nm	2.710'000'000'0	b	1.18E-3	year	37.296	kilo-seconds ( x³ )	100.000'000	%	ϵ	376.260	keV	¹⁶⁵Ho	¹⁶⁵Er > [ 100 % , ϵ , 376.26 keV ] > ¹⁶⁵Ho						100.000'000	%	¹⁶⁵Ho
Isotope_068_er_166_s	Stable	¹⁶⁶Er	Boson	68	p	98	n	0	1	165.930'293'061'0	u	33.610'000	%	55.769'171'497'8	-64.931'595'000'0	MeV	8.141'992'000'0	MeV	-		-		-
Isotope_068_er_167_s	Stable	¹⁶⁷Er	Fermion	68	p	99	n	7/2	1	166.932'048'159'0	u	22.930'000	%	38.277'518'642'9	-63.296'733'000'0	MeV	8.131'779'000'0	MeV	-0.563'850'000'0	nm	3.565'000'000'0	b	-
Isotope_068_er_168_s	Stable	¹⁶⁸Er	Boson	68	p	100	n	0	1	167.932'370'224'0	u	26.780'000	%	44.972'288'746'0	-62.996'731'000'0	MeV	8.129'634'000'0	MeV	-		-		-
Isotope_068_er_169_u	Unstable	¹⁶⁹Er	Fermion	68	p	101	n	1/2	-1	168.934'590'364'0	u	~ 0	%	~ 0	-60.928'684'000'0	MeV	8.117'052'000'0	MeV	0.515'000'000'0	nm	-		2.57E-2	year	810.432	kilo-seconds ( x³ )	100.000'000	%	β-	351.280	keV	¹⁶⁹Tm	¹⁶⁹Er > [ 100 % , β- , 351.28 keV ] > ¹⁶⁹Tm						100.000'000	%	¹⁶⁹Tm
Isotope_068_er_170_s	Stable	¹⁷⁰Er	Boson	68	p	102	n	0	1	169.935'464'312'0	u	14.930'000	%	25.371'364'821'8	-60.114'606'000'0	MeV	8.111'994'000'0	MeV	-		-		-				?	%	2β-	654.350	keV	¹⁷⁰Yb	¹⁷⁰Er > [ ? % , 2β- , 654.35 keV ] > ¹⁷⁰Yb	α	50.600	keV	¹⁶⁶Dy	¹⁷⁰Er > [ , α , 50.6 keV ] > ¹⁶⁶Dy	?	%	¹⁶⁶Er	?	%	¹⁷⁰Yb
Isotope_068_er_171_u	Unstable	¹⁷¹Er	Fermion	68	p	103	n	5/2	-1	170.938'029'808'0	u	~ 0	%	~ 0	-57.724'862'000'0	MeV	8.097'781'000'0	MeV	0.659'000'000'0	nm	2.860'000'000'0	b	2.06E-2	year	649.440	kilo-seconds ( x³ )	100.000'000	%	β-	1,490.730	keV	¹⁷¹Tm	¹⁷¹Er > [ 100 % , β- , 1,490.73 keV ] > ¹⁷¹Tm						100.000'000	%	¹⁷¹Yb
Isotope_068_er_172_u	Unstable	¹⁷²Er	Boson	68	p	104	n	0	1	171.939'356'113'0	u	~ 0	%	~ 0	-56.489'417'000'0	MeV	8.090'444'000'0	MeV	-		-		5.61E-3	year	177.034	kilo-seconds ( x³ )	100.000'000	%	β-	890.570	keV	¹⁷²Tm	¹⁷²Er > [ 100 % , β- , 890.57 keV ] > ¹⁷²Tm						100.000'000	%	¹⁷²Yb
Isotope_068_er_173_u	Unstable	¹⁷³Er	Fermion	68	p	105	n	7/2	-1	172.942'400'000'0	u	~ 0	%	~ 0	-53.654'000'000'0	MeV	8.074'000'000'0	MeV	-		-		2.73E-6	year	86.040	seconds ( x⁰ )	100.000'000	%	β-	2,605.000	keV	¹⁷³Tm	¹⁷³Er > [ 100 % , β- , 2,605.0 keV ] > ¹⁷³Tm						100.000'000	%	¹⁷³Yb
Isotope_068_er_174_u	Unstable	¹⁷⁴Er	Boson	68	p	106	n	0	1	173.944'230'000'0	u	~ 0	%	~ 0	-51.949'000'000'0	MeV	8.064'000'000'0	MeV	-		-		6.02E-6	year	190.020	seconds ( x⁰ )	100.000'000	%	β-	1,920.000	keV	¹⁷⁴Tm	¹⁷⁴Er > [ 100 % , β- , 1,920.0 keV ] > ¹⁷⁴Tm						100.000'000	%	¹⁷⁴Yb
Isotope_068_er_175_u	Unstable	¹⁷⁵Er	Fermion	68	p	107	n	9/2	1	174.947'770'000'0	u	~ 0	%	~ 0	-48.652'000'000'0	MeV	8.045'000'000'0	MeV	-		-		2.28E-6	year	72.000	seconds ( x⁰ )	100.000'000	%	β-	3,664.000	keV	¹⁷⁵Tm	¹⁷⁵Er > [ 100 % , β- , 3,664.0 keV ] > ¹⁷⁵Tm						100.000'000	%	¹⁷⁵Lu
Isotope_068_er_176_u	Unstable	¹⁷⁶Er	Boson	68	p	108	n	0	1	175.950'080'000'0	u	~ 0	%	~ 0	-46.500'000'000'0	MeV	8.033'000'000'0	MeV	-		-		6.34E-7	year	20.000	seconds ( x⁰ )	?	%	β-	2,874.000	keV	¹⁷⁶Tm	¹⁷⁶Er > [ ? % , β- , 2,874.0 keV ] > ¹⁷⁶Tm						?	%	¹⁷²Yb	?	%	¹⁷⁶Hf
Isotope_068_er_177_u	Unstable	¹⁷⁷Er	Fermion	68	p	109	n	1/2	-1	176.954'050'000'0	u	~ 0	%	~ 0	-42.802'000'000'0	MeV	8.013'000'000'0	MeV	-		-		9.51E-8	year	3.000	seconds ( x⁰ )	?	%	β-	4,667.000	keV	¹⁷⁷Tm	¹⁷⁷Er > [ ? % , β- , 4,667.0 keV ] > ¹⁷⁷Tm						?	%	¹⁷⁷Hf

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