Lutetimi (Lu)

element with the atomic number of 71

Atomic Number	71
Atomic Weight	174.9668
mass number	175

Group
Period	6
Block	f

proton	71 p⁺
neutron	104 n⁰
electron	71 e^-

Physical Property

Atomic Radius	175 pm 270 pm
molar volume	17.8 cm³/mol
Covalent Radius	162 pm 131 pm 131 pm 187 pm
Metallic Radius
ionic radius	86.1 pm 97.7 pm 103.2 pm
Crystal Radius	100.1 pm 111.7 pm 117.2 pm
Van der Waals radius	224 pm 265 pm 364 pm
density	9.84 g/cm³ 9300 kg/m³

Chemical Property

{ERROR}

energy

proton affinity	992 kJ/mol
electron affinity	0.34 eV/particle
ionization energy	5.425871 eV/particle 13.9 eV/particle 20.9551 eV/particle 45.249 eV/particle 66.79 eV/particle 98 eV/particle 117 eV/particle 136 eV/particle 159 eV/particle 185 eV/particle 205 eV/particle 238 eV/particle 276 eV/particle 305 eV/particle 328 eV/particle 361 eV/particle 399 eV/particle 438 eV/particle 476 eV/particle 520 eV/particle 560 eV/particle 600 eV/particle 640 eV/particle 670 eV/particle 713 eV/particle 941 eV/particle 985 eV/particle 1032 eV/particle 1081 eV/particle 1130 eV/particle 1178 eV/particle 1242 eV/particle 1292 eV/particle 1345 eV/particle 1395 eV/particle 1591 eV/particle 1641 eV/particle 1696 eV/particle 1747 eV/particle 1875 eV/particle 1933 eV/particle 2067 eV/particle 2125.5 eV/particle 3590 eV/particle 3706 eV/particle 3828 eV/particle 3960 eV/particle 4086 eV/particle 4211 eV/particle 4403 eV/particle 4532 eV/particle 4673 eV/particle 4803 eV/particle 5168 eV/particle 5282 eV/particle 5408 eV/particle 5525 eV/particle 5937 eV/particle 6070 eV/particle 6326 eV/particle 6452 eV/particle 14228 eV/particle 14542 eV/particle 14890 eV/particle 15211 eV/particle 16730 eV/particle 17120 eV/particle 17610 eV/particle 17928.05 eV/particle 72322.91 eV/particle 73804.8 eV/particle

enthalpy of vaporization	414 kJ/mol
enthalpy of fusion
standard enthalpy of formation	427.6 kJ/mol
electron

electron shell	2, 8, 18, 32, 9, 2

valence electron	2 ⓘ

electron configuration	[Xe] 4f¹⁴ 5d¹ 6s²ⓘ 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 4f¹⁴ 5d¹ 6s²

oxidation number	0, 2, 3
electronegativity	6.455 eV/particle 0.22565 1
Electrophilicity Index	0.817098693336918 eV/particle
fundamental state of matter

phase of matter
gaseous state of matter
Boiling Point	3675.15 K
Melting Point	1936.15 K
critical pressure
critical temperature
triple point
appearance
color	Black #ff1493 #00ab24 #00ab24
appearance	silvery white
refractive index
thermodynamic material property
Thermal Conductivity
thermal expansion	0.00001 1/K
molar heat capacity	26.86 J/(mol K)
Specific Heat Capacity	0.154 J/(g⋅K)
heat capacity ratio
electrical properties
type	Conductor
electrical conductivity	1.8 MS/m
electrical resistivity	0.00000057 Ω*m
superconductivity	0.1 K
magnetism
type	paramagnetic
magnetic susceptibility (Mass)	0.0000000012 m³/Kg
magnetic susceptibility (Molar)	0.00000000021 m³/mol
magnetic susceptibility (Volume)	0.0000118
magnetic ordering
Curie temperature
Néel temperature
structure
Crystal Structure	{ERROR}
lattice constant	3.51 Å
Lattice Angles	π/2, π/2, 2 π/3
mechanical property
hardness	893 MPa 1160 MPa
bulk modulus	48 GPa
shear modulus	27 GPa
Young's modulus	69 GPa
Poisson's ratio	0.26
speed of sound
classification
Category	Actinides, Transition metals
CAS Group
IUPAC Group
Glawe Number	19
Mendeleev Number	41
Pettifor Number	21
Geochemical Class	rare earth & related
Goldschmidt classification	litophile

other

Gas Basicity	970.6 kJ/mol
polarizability	137 ± 7 a₀
C6 Dispersion Coefficient	2020 a₀
allotrope
Neutron cross section	85
Neutron Mass Absorption	0.022
quantum number	2D3/2
space group	194 (P63/mmc)

Isotopes of Lutetium

Stable Isotopes	1
Unstable Isotopes	38
Natural Isotopes	2

¹⁵⁰Lu

mass number	150
neutron number	79
Relative Atomic Mass	149.973407 ± 0.000322 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	45 ± 3 ms
spin	5
nuclear quadrupole moment
time of discovery or invention	1993
parity	-

decay mode	intensity
p (proton emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹⁵¹Lu

mass number	151
neutron number	80
Relative Atomic Mass	150.967471 ± 0.000322 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	78.4 ± 0.9 ms
spin	11/2
nuclear quadrupole moment
time of discovery or invention	1982
parity	-

decay mode	intensity
p (proton emission)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹⁵²Lu

mass number	152
neutron number	81
Relative Atomic Mass	151.96412 ± 0.00021 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	650 ± 70 ms
spin	4
nuclear quadrupole moment
time of discovery or invention	1987
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	15%

¹⁵³Lu

mass number	153
neutron number	82
Relative Atomic Mass	152.958802248 ± 0.00016105 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	900 ± 200 ms
spin	11/2
nuclear quadrupole moment
time of discovery or invention	1989
parity	-

decay mode	intensity
α (α emission)
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
p (proton emission)	0%

¹⁵⁴Lu

mass number	154
neutron number	83
Relative Atomic Mass	153.957416 ± 0.000216 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	2
nuclear quadrupole moment
time of discovery or invention	1981
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)

¹⁵⁵Lu

mass number	155
neutron number	84
Relative Atomic Mass	154.954326005 ± 0.00002066 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	68 ± 2 ms
spin	11/2
nuclear quadrupole moment
time of discovery or invention	1965
parity	-

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

¹⁵⁶Lu

mass number	156
neutron number	85
Relative Atomic Mass	155.953086606 ± 0.000058102 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	494 ± 12 ms
spin	2
nuclear quadrupole moment
time of discovery or invention	1965
parity

decay mode	intensity
α (α emission)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)

¹⁵⁷Lu

mass number	157
neutron number	86
Relative Atomic Mass	156.950144807 ± 0.000012961 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	7.7 ± 2 s
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1977
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)
α (α emission)

¹⁵⁸Lu

mass number	158
neutron number	87
Relative Atomic Mass	157.94931562 ± 0.000016236 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	10.6 ± 0.3 s
spin	2
nuclear quadrupole moment
time of discovery or invention	1979
parity

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.09%
α (α emission)	0.91%

¹⁵⁹Lu

mass number	159
neutron number	88
Relative Atomic Mass	158.946635615 ± 0.000040433 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	12.1 ± 1 s
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1980
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)

¹⁶⁰Lu

mass number	160
neutron number	89
Relative Atomic Mass	159.946033 ± 0.000061 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	36.1 ± 0.3 s
spin	2
nuclear quadrupole moment
time of discovery or invention	1979
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
α (α emission)

¹⁶¹Lu

mass number	161
neutron number	90
Relative Atomic Mass	160.943572 ± 0.00003 Da
g-factor	0.444 ± 0.006
natural abundance
radioactivity	☢️ radioactive element
half-life	77 ± 2 s
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1973
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶²Lu

mass number	162
neutron number	91
Relative Atomic Mass	161.943282776 ± 0.000080554 Da
g-factor	0.0551 ± 0.0011
natural abundance
radioactivity	☢️ radioactive element
half-life	1.37 ± 0.02 m
spin	1
nuclear quadrupole moment	0.519 ± 0.008
time of discovery or invention	1978
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶³Lu

mass number	163
neutron number	92
Relative Atomic Mass	162.941179 ± 0.00003 Da
g-factor	0.1534 ± 0.002
natural abundance
radioactivity	☢️ radioactive element
half-life	3.97 ± 0.13 m
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1979
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁴Lu

mass number	164
neutron number	93
Relative Atomic Mass	163.941339 ± 0.00003 Da
g-factor	0.0589 ± 0.0011
natural abundance
radioactivity	☢️ radioactive element
half-life	3.14 ± 0.03 m
spin	1
nuclear quadrupole moment	0.608 ± 0.007
time of discovery or invention	1977
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁵Lu

mass number	165
neutron number	94
Relative Atomic Mass	164.939406758 ± 0.00002849 Da
g-factor	-0.0488 ± 0.0006
natural abundance
radioactivity	☢️ radioactive element
half-life	10.74 ± 0.1 m
spin	1/2
nuclear quadrupole moment	0
time of discovery or invention	1973
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁶Lu

mass number	166
neutron number	95
Relative Atomic Mass	165.939859 ± 0.000032 Da
g-factor	0.48383333333333 ± 0.002
natural abundance
radioactivity	☢️ radioactive element
half-life	2.65 ± 0.1 m
spin	6
nuclear quadrupole moment	4.33 ± 0.04
time of discovery or invention	1969
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁷Lu

mass number	167
neutron number	96
Relative Atomic Mass	166.938243 ± 0.00004 Da
g-factor	0.66228571428571 ± 0.0011428571428571
natural abundance
radioactivity	☢️ radioactive element
half-life	51.5 ± 1 m
spin	7/2
nuclear quadrupole moment	3.28 ± 0.02
time of discovery or invention	1958
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁸Lu

mass number	168
neutron number	97
Relative Atomic Mass	167.938729798 ± 0.000040766 Da
g-factor	0.50116666666667 ± 0.0041666666666667
natural abundance
radioactivity	☢️ radioactive element
half-life	5.5 ± 0.1 m
spin	6
nuclear quadrupole moment	4.77 ± 0.06
time of discovery or invention	1960
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁶⁹Lu

mass number	169
neutron number	98
Relative Atomic Mass	168.937645845 ± 0.000003226 Da
g-factor	0.65371428571429 ± 0.0011428571428571
natural abundance
radioactivity	☢️ radioactive element
half-life	34.06 ± 0.05 h
spin	7/2
nuclear quadrupole moment	3.48 ± 0.03
time of discovery or invention	1955
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁰Lu

mass number	170
neutron number	99
Relative Atomic Mass	169.93847923 ± 0.000018081 Da
g-factor	0
natural abundance
radioactivity	☢️ radioactive element
half-life	2.012 ± 0.03 d
spin	0
nuclear quadrupole moment	0
time of discovery or invention	1951
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷¹Lu

mass number	171
neutron number	100
Relative Atomic Mass	170.937918591 ± 0.000001999 Da
g-factor	0.65314285714286 ± 0.0011428571428571
natural abundance
radioactivity	☢️ radioactive element
half-life	8.247 ± 0.023 d
spin	7/2
nuclear quadrupole moment	3.53 ± 0.03
time of discovery or invention	1951
parity	+

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷²Lu

mass number	172
neutron number	101
Relative Atomic Mass	171.93909132 ± 0.000002507 Da
g-factor	0.72275 ± 0.0025
natural abundance
radioactivity	☢️ radioactive element
half-life	6.7 ± 0.03 d
spin	4
nuclear quadrupole moment	3.8 ± 0.04
time of discovery or invention	1951
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷³Lu

mass number	173
neutron number	102
Relative Atomic Mass	172.938935722 ± 0.000001682 Da
g-factor	0.64942857142857 ± 0.00057142857142857
natural abundance
radioactivity	☢️ radioactive element
half-life	1.37 ± 0.01 y
spin	7/2
nuclear quadrupole moment	3.53 ± 0.02
time of discovery or invention	1951
parity	+

decay mode	intensity
ϵ (electron capture)	100%

¹⁷⁴Lu

mass number	174
neutron number	103
Relative Atomic Mass	173.94034284 ± 0.000001682 Da
g-factor	1.982 ± 0.005
natural abundance
radioactivity	☢️ radioactive element
half-life	3.31 ± 0.05 y
spin	1
nuclear quadrupole moment	0.773 ± 0.007
time of discovery or invention	1951
parity	-

decay mode	intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%

¹⁷⁵Lu

mass number	175
neutron number	104
Relative Atomic Mass	174.940777211 ± 0.000001295 Da
g-factor	0.63591428571429 ± 0.00054285714285714
natural abundance	97.401 ± 0.013
radioactivity	stable isotope
half-life	Not Radioactive ☢️
spin	7/2
nuclear quadrupole moment	3.49 ± 0.02
time of discovery or invention	1934
parity	+

¹⁷⁶Lu

mass number	176
neutron number	105
Relative Atomic Mass	175.942691711 ± 0.000001301 Da
g-factor	0.45142857142857 ± 0.00071428571428571
natural abundance	2.599 ± 0.013
radioactivity	☢️ radioactive element
half-life	37.01 ± 0.17 Gy
spin	7
nuclear quadrupole moment
time of discovery or invention	1935
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0.45%

¹⁷⁷Lu

mass number	177
neutron number	106
Relative Atomic Mass	176.94376357 ± 0.00000131 Da
g-factor	0.63757142857143 ± 0.0004
natural abundance
radioactivity	☢️ radioactive element
half-life	6.6443 ± 0.0009 d
spin	7/2
nuclear quadrupole moment	3.39 ± 0.03
time of discovery or invention	1945
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁷⁸Lu

mass number	178
neutron number	107
Relative Atomic Mass	177.945960065 ± 0.000002416 Da
g-factor	-1.373 ± 0.009
natural abundance
radioactivity	☢️ radioactive element
half-life	28.4 ± 0.2 m
spin	1
nuclear quadrupole moment	0.708 ± 0.01
time of discovery or invention	1957
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁷⁹Lu

mass number	179
neutron number	108
Relative Atomic Mass	178.947332985 ± 0.000005528 Da
g-factor	0.67657142857143 ± 0.0034285714285714
natural abundance
radioactivity	☢️ radioactive element
half-life	4.59 ± 0.06 h
spin	7/2
nuclear quadrupole moment	3.32 ± 0.03
time of discovery or invention	1961
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁰Lu

mass number	180
neutron number	109
Relative Atomic Mass	179.949890744 ± 0.000075926 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	5.7 ± 0.1 m
spin	5
nuclear quadrupole moment
time of discovery or invention	1971
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸¹Lu

mass number	181
neutron number	110
Relative Atomic Mass	180.951908 ± 0.000135 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	3.5 ± 0.3 m
spin	7/2
nuclear quadrupole moment
time of discovery or invention	1982
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸²Lu

mass number	182
neutron number	111
Relative Atomic Mass	181.955158 ± 0.000215 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	2 ± 0.2 m
spin	1
nuclear quadrupole moment
time of discovery or invention	1982
parity	-

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸³Lu

mass number	183
neutron number	112
Relative Atomic Mass	182.957363 ± 0.000086 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	58 ± 4 s
spin	7/2
nuclear quadrupole moment
time of discovery or invention	1983
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁴Lu

mass number	184
neutron number	113
Relative Atomic Mass	183.96103 ± 0.000215 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life	20 ± 3 s
spin	3
nuclear quadrupole moment
time of discovery or invention	1989
parity	+

decay mode	intensity
β⁻ (β⁻ decay)	100%

¹⁸⁵Lu

mass number	185
neutron number	114
Relative Atomic Mass	184.963542 ± 0.000322 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	7/2
nuclear quadrupole moment
time of discovery or invention	2009
parity	+

decay mode	intensity
β⁻ (β⁻ decay)

¹⁸⁶Lu

mass number	186
neutron number	115
Relative Atomic Mass	185.96745 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin
nuclear quadrupole moment
time of discovery or invention	2012
parity

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

¹⁸⁷Lu

mass number	187
neutron number	116
Relative Atomic Mass	186.970188 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin	7/2
nuclear quadrupole moment
time of discovery or invention	2012
parity	+

decay mode	intensity
β⁻ (β⁻ decay)

¹⁸⁸Lu

mass number	188
neutron number	117
Relative Atomic Mass	187.974428 ± 0.000429 Da
g-factor
natural abundance
radioactivity	☢️ radioactive element
half-life
spin
nuclear quadrupole moment
time of discovery or invention	2012
parity

decay mode	intensity
β⁻ (β⁻ decay)
β⁻ n (β⁻-delayed neutron emission)

history

discoverer or inventor	Georges Urbain
location of discovery	France
time of discovery or invention	1907
etymology	Named for the ancient name of Paris, Lutecia.
pronunciation	loo-TEE-shi-em (English)

source

Abundance
Abundance in Earth's crust	0.8 mg/kg
natural abundance (ocean)	0.00000015 mg/L
natural abundance (Human body)
natural abundance (meteoroid)	0.0000029 %
natural abundance (La)	0.0000001 %
Abundance in Universe	0.00000001 %

Nuclear Screening Constants

1	s	1.3805
2	p	4.389
2	s	18.5502
3	d	13.5812
3	p	20.8337
3	s	21.4655
4	d	35.7108
4	f	40.0688
4	p	33.8096
4	s	32.7308
5	d	50.887
5	p	52.32
5	s	50.045
6	s	62.1956

Lutetimi on ChemicalAid

lutetium

Lutetimi (Lu)

Physical Property

Chemical Property

other

Isotopes of Lutetium

150Lu

151Lu

152Lu

153Lu

154Lu

155Lu

156Lu

157Lu

158Lu

159Lu

160Lu

161Lu

162Lu

163Lu

164Lu

165Lu

166Lu

167Lu

168Lu

169Lu

170Lu

171Lu

172Lu

173Lu

174Lu

175Lu

176Lu

177Lu

178Lu

179Lu

180Lu

181Lu

182Lu

183Lu

184Lu

185Lu

186Lu

187Lu

188Lu

history

source

Nuclear Screening Constants

¹⁵⁰Lu

¹⁵¹Lu

¹⁵²Lu

¹⁵³Lu

¹⁵⁴Lu

¹⁵⁵Lu

¹⁵⁶Lu

¹⁵⁷Lu

¹⁵⁸Lu

¹⁵⁹Lu

¹⁶⁰Lu

¹⁶¹Lu

¹⁶²Lu

¹⁶³Lu

¹⁶⁴Lu

¹⁶⁵Lu

¹⁶⁶Lu

¹⁶⁷Lu

¹⁶⁸Lu

¹⁶⁹Lu

¹⁷⁰Lu

¹⁷¹Lu

¹⁷²Lu

¹⁷³Lu

¹⁷⁴Lu

¹⁷⁵Lu

¹⁷⁶Lu

¹⁷⁷Lu

¹⁷⁸Lu

¹⁷⁹Lu

¹⁸⁰Lu

¹⁸¹Lu

¹⁸²Lu

¹⁸³Lu

¹⁸⁴Lu

¹⁸⁵Lu

¹⁸⁶Lu

¹⁸⁷Lu

¹⁸⁸Lu