Lutetium (Lu)

Lutetium is the 71st element in the periodic table and has a symbol of Lu and atomic number of 71. It has an atomic weight of 174.9668 and a mass number of 175. Lutetium has seventy-one protons and one hundred four neutrons in its nucleus, and seventy-one electrons in six shells. It is located in group zero, period six and block f of the periodic table. Silvery-white rare-earth metal which is relatively stable in air. It happens to be the most expensive rare-earth metal. Its found with almost all rare-earth metals, but is very difficult to separate from other elements. Least abundant of all natural elements. Used in metal alloys, and as a catalyst in various processes. There are two natural, stable isotopes, and seven radioisotopes, the most stable being Lu-174 with a half-life of 3.3 years. The separation of lutetium from Ytterbium was described by Georges Urbain in 1907. It was discovered at approximately the same time by Carl Auer von Welsbach. The name comes from the Greek word lutetia which means Paris.

Atomic Number	71
Atomic Weight	174.9668
Mass Number	175

Group
Period	6
Block	f

Protons	71 p⁺
Neutrons	104 n⁰
Electrons	71 e^-

Properties

Physical Properties
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 9,300 kg/m³
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 1,032 eV/particle 1,081 eV/particle 1,130 eV/particle 1,178 eV/particle 1,242 eV/particle 1,292 eV/particle 1,345 eV/particle 1,395 eV/particle 1,591 eV/particle 1,641 eV/particle 1,696 eV/particle 1,747 eV/particle 1,875 eV/particle 1,933 eV/particle 2,067 eV/particle 2,125.5 eV/particle 3,590 eV/particle 3,706 eV/particle 3,828 eV/particle 3,960 eV/particle 4,086 eV/particle 4,211 eV/particle 4,403 eV/particle 4,532 eV/particle 4,673 eV/particle 4,803 eV/particle 5,168 eV/particle 5,282 eV/particle 5,408 eV/particle 5,525 eV/particle 5,937 eV/particle 6,070 eV/particle 6,326 eV/particle 6,452 eV/particle 14,228 eV/particle 14,542 eV/particle 14,890 eV/particle 15,211 eV/particle 16,730 eV/particle 17,120 eV/particle 17,610 eV/particle 17,928.05 eV/particle 72,322.91 eV/particle 73,804.8 eV/particle

Heat of Vaporization	414 kJ/mol
Heat of Fusion
Heat of Formation	427.6 kJ/mol
Electrons
Electron Shells	2, 8, 18, 32, 9, 2

Valence Electrons	2

Electron Configuration	[Xe] 4f¹⁴ 5d¹ 6s²

Oxidation States	0, 2, 3
Electronegativity	6.455 eV/particle 0.22565 1
Electrophilicity	0.817098693336918 eV/particle
Phases
Phase	Solid
Gas Phase
Boiling Point	3,675.15 K
Melting Point	1,936.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual
Lutetium is a Silver. Lu has a CPK of #ff1493, Jmol of #00ab24, and MOLCAS GV of #00ab24. The Appearance of Element 71 is silvery white.
Color	Silver #ff1493 #00ab24 #00ab24
Appearance	silvery white
Refractive Index
Thermodynamic Properties
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 (Adiabatic Index)
Electrical Properties
Type	Conductor
Electrical Conductivity	1.8 MS/m
Electrical Resistivity	0.00000057 m Ω
Superconducting Point	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 Point
Neel Point
Structure
The Crystal Structure of Lutetium is HEX. The lattice constant of Lu is 3.51 Å. The lattice angles of Element 71 are π/2, π/2, 2 π/3.
Crystal Structure	Simple Hexagonal (HEX)
Lattice Constant	3.51 Å
Lattice Angles	π/2, π/2, 2 π/3
Mechanical Properties
Lutetium has a Brinell of 893 MPa, and Vickers of 1160 MPa. The Bulk Modulus of Lu is 48 GPa. The Shear Modulus of Element 71 is 27 GPa. The Young Modulus of Lutetium (Lu) is 69 GPa. The Poisson Ratio of Lutetium is 0.26.
Hardness	893 MPa 1,160 MPa
Bulk Modulus	48 GPa
Shear Modulus	27 GPa
Young Modulus	69 GPa
Poisson Ratio	0.26
Speed of Sound
Classification
The Glawe Number of Lutetium is 19. The Mendeleev Number of Lu is 41. The Pettifor Number of Element 71 is 21. The Geochemical Class of Lutetium (Lu) is rare earth & related. The Goldschmidt Class of Lutetium is litophile.
Category	Lanthanides, Transition metals
CAS Group
IUPAC Group
Glawe Number	19
Mendeleev Number	41
Pettifor Number	21
Geochemical Class	rare earth & related
Goldschmidt Class	litophile
Other
The Gas Basicity of Lutetium is 970.6 kJ/mol. The Dipole Polarizability of Lu is 137 plus or minus 7 a₀. Element 71 has a C6 Dispersion Coefficient (GB) of 2020 a₀. The Allotropes of Lutetium (Lu) is . The Neutron Cross Section of Lutetium is 85. The Neutron Mass Absorption of Lu is 0.022. The Quantum Numbers of Element 71 is 2D3/2. The Space Group of Lutetium (Lu) is 194 (P63/mmc).
Gas Basicity	970.6 kJ/mol
Dipole Polarizability	137 ± 7 a₀
C6 Dispersion Coefficient	2,020 a₀
Allotropes
Neutron Cross Section	85
Neutron Mass Absorption	0.022
Quantum Numbers	2D3/2
Space Group	194 (P63/mmc)

Isotopes of Lutetium

Stable Isotopes	2
Unstable Isotopes	37
Radioactive Isotopes	38

¹⁵⁰Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	149.973407 ± 0.000322 Da
Mass Number	150
G-Factor
Half Life	45 ± 3 ms
Spin	5
Quadrupole Moment
Discovery Year	1993
Parity	-

¹⁵⁰Lu Decay Modes

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

¹⁵¹Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	150.967471 ± 0.000322 Da
Mass Number	151
G-Factor
Half Life	78.4 ± 0.9 ms
Spin	11/2
Quadrupole Moment
Discovery Year	1982
Parity	-

¹⁵¹Lu Decay Modes

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

¹⁵²Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	151.96412 ± 0.00021 Da
Mass Number	152
G-Factor
Half Life	650 ± 70 ms
Spin	4
Quadrupole Moment
Discovery Year	1987
Parity	-

¹⁵²Lu Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	15%

¹⁵³Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	152.958802248 ± 0.00016105 Da
Mass Number	153
G-Factor
Half Life	900 ± 200 ms
Spin	11/2
Quadrupole Moment
Discovery Year	1989
Parity	-

¹⁵³Lu Decay Modes

Decay Mode	Intensity
α (α emission)	%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	%
p (proton emission)	0%

¹⁵⁴Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	153.957416 ± 0.000216 Da
Mass Number	154
G-Factor
Half Life
Spin	2
Quadrupole Moment
Discovery Year	1981
Parity	-

¹⁵⁴Lu Decay Modes

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

¹⁵⁵Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	154.954326005 ± 0.00002066 Da
Mass Number	155
G-Factor
Half Life	68 ± 2 ms
Spin	11/2
Quadrupole Moment
Discovery Year	1965
Parity	-

¹⁵⁵Lu Decay Modes

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

¹⁵⁶Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	155.953086606 ± 0.000058102 Da
Mass Number	156
G-Factor
Half Life	494 ± 12 ms
Spin	2
Quadrupole Moment
Discovery Year	1965
Parity

¹⁵⁶Lu Decay Modes

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

¹⁵⁷Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	156.950144807 ± 0.000012961 Da
Mass Number	157
G-Factor
Half Life	7.7 ± 2 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1977
Parity	+

¹⁵⁷Lu Decay Modes

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

¹⁵⁸Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	157.94931562 ± 0.000016236 Da
Mass Number	158
G-Factor
Half Life	10.6 ± 0.3 s
Spin	2
Quadrupole Moment
Discovery Year	1979
Parity

¹⁵⁸Lu Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.09%
α (α emission)	0.91%

¹⁵⁹Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	158.946635615 ± 0.000040433 Da
Mass Number	159
G-Factor
Half Life	12.1 ± 1 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1980
Parity	+

¹⁵⁹Lu Decay Modes

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

¹⁶⁰Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	159.946033 ± 0.000061 Da
Mass Number	160
G-Factor
Half Life	36.1 ± 0.3 s
Spin	2
Quadrupole Moment
Discovery Year	1979
Parity	-

¹⁶⁰Lu Decay Modes

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

¹⁶¹Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	160.943572 ± 0.00003 Da
Mass Number	161
G-Factor	0.444 ± 0.006
Half Life	77 ± 2 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1973
Parity	+

¹⁶¹Lu Decay Modes

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

¹⁶²Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	161.943282776 ± 0.000080554 Da
Mass Number	162
G-Factor	0.0551 ± 0.0011
Half Life	1.37 ± 0.02 m
Spin	1
Quadrupole Moment	0.519 ± 0.008
Discovery Year	1978
Parity	-

¹⁶²Lu Decay Modes

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

¹⁶³Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	162.941179 ± 0.00003 Da
Mass Number	163
G-Factor	0.1534 ± 0.002
Half Life	3.97 ± 0.13 m
Spin	1/2
Quadrupole Moment	0
Discovery Year	1979
Parity	+

¹⁶³Lu Decay Modes

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

¹⁶⁴Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	163.941339 ± 0.00003 Da
Mass Number	164
G-Factor	0.0589 ± 0.0011
Half Life	3.14 ± 0.03 m
Spin	1
Quadrupole Moment	0.608 ± 0.007
Discovery Year	1977
Parity	-

¹⁶⁴Lu Decay Modes

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

¹⁶⁵Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	164.939406758 ± 0.00002849 Da
Mass Number	165
G-Factor	-0.0488 ± 0.0006
Half Life	10.74 ± 0.1 m
Spin	1/2
Quadrupole Moment	0
Discovery Year	1973
Parity	+

¹⁶⁵Lu Decay Modes

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

¹⁶⁶Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	165.939859 ± 0.000032 Da
Mass Number	166
G-Factor	0.48383333333333 ± 0.002
Half Life	2.65 ± 0.1 m
Spin	6
Quadrupole Moment	4.33 ± 0.04
Discovery Year	1969
Parity	-

¹⁶⁶Lu Decay Modes

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

¹⁶⁷Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	166.938243 ± 0.00004 Da
Mass Number	167
G-Factor	0.66228571428571 ± 0.0011428571428571
Half Life	51.5 ± 1 m
Spin	7/2
Quadrupole Moment	3.28 ± 0.02
Discovery Year	1958
Parity	+

¹⁶⁷Lu Decay Modes

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

¹⁶⁸Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	167.938729798 ± 0.000040766 Da
Mass Number	168
G-Factor	0.50116666666667 ± 0.0041666666666667
Half Life	5.5 ± 0.1 m
Spin	6
Quadrupole Moment	4.77 ± 0.06
Discovery Year	1960
Parity	-

¹⁶⁸Lu Decay Modes

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

¹⁶⁹Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	168.937645845 ± 0.000003226 Da
Mass Number	169
G-Factor	0.65371428571429 ± 0.0011428571428571
Half Life	34.06 ± 0.05 h
Spin	7/2
Quadrupole Moment	3.48 ± 0.03
Discovery Year	1955
Parity	+

¹⁶⁹Lu Decay Modes

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

¹⁷⁰Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	169.93847923 ± 0.000018081 Da
Mass Number	170
G-Factor	0
Half Life	2.012 ± 0.03 d
Spin	0
Quadrupole Moment	0
Discovery Year	1951
Parity	+

¹⁷⁰Lu Decay Modes

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

¹⁷¹Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	170.937918591 ± 0.000001999 Da
Mass Number	171
G-Factor	0.65314285714286 ± 0.0011428571428571
Half Life	8.247 ± 0.023 d
Spin	7/2
Quadrupole Moment	3.53 ± 0.03
Discovery Year	1951
Parity	+

¹⁷¹Lu Decay Modes

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

¹⁷²Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	171.93909132 ± 0.000002507 Da
Mass Number	172
G-Factor	0.72275 ± 0.0025
Half Life	6.7 ± 0.03 d
Spin	4
Quadrupole Moment	3.8 ± 0.04
Discovery Year	1951
Parity	-

¹⁷²Lu Decay Modes

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

¹⁷³Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	172.938935722 ± 0.000001682 Da
Mass Number	173
G-Factor	0.64942857142857 ± 0.00057142857142857
Half Life	1.37 ± 0.01 y
Spin	7/2
Quadrupole Moment	3.53 ± 0.02
Discovery Year	1951
Parity	+

¹⁷³Lu Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%

¹⁷⁴Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	173.94034284 ± 0.000001682 Da
Mass Number	174
G-Factor	1.982 ± 0.005
Half Life	3.31 ± 0.05 y
Spin	1
Quadrupole Moment	0.773 ± 0.007
Discovery Year	1951
Parity	-

¹⁷⁴Lu Decay Modes

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

¹⁷⁵Lu

Abundance	97.401 ± 0.013
Relative Atomic Mass	174.940777211 ± 0.000001295 Da
Mass Number	175
G-Factor	0.63591428571429 ± 0.00054285714285714
Half Life
Spin	7/2
Quadrupole Moment	3.49 ± 0.02
Discovery Year	1934
Parity	+

¹⁷⁶Lu

Abundance	Radioactive ☢️ 2.599 ± 0.013
Relative Atomic Mass	175.942691711 ± 0.000001301 Da
Mass Number	176
G-Factor	0.45142857142857 ± 0.00071428571428571
Half Life	37.01 ± 0.17 Gy
Spin	7
Quadrupole Moment
Discovery Year	1935
Parity	-

¹⁷⁶Lu Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	0.45%

¹⁷⁷Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	176.94376357 ± 0.00000131 Da
Mass Number	177
G-Factor	0.63757142857143 ± 0.0004
Half Life	6.6443 ± 0.0009 d
Spin	7/2
Quadrupole Moment	3.39 ± 0.03
Discovery Year	1945
Parity	+

¹⁷⁷Lu Decay Modes

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

¹⁷⁸Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	177.945960065 ± 0.000002416 Da
Mass Number	178
G-Factor	-1.373 ± 0.009
Half Life	28.4 ± 0.2 m
Spin	1
Quadrupole Moment	0.708 ± 0.01
Discovery Year	1957
Parity	+

¹⁷⁸Lu Decay Modes

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

¹⁷⁹Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	178.947332985 ± 0.000005528 Da
Mass Number	179
G-Factor	0.67657142857143 ± 0.0034285714285714
Half Life	4.59 ± 0.06 h
Spin	7/2
Quadrupole Moment	3.32 ± 0.03
Discovery Year	1961
Parity	+

¹⁷⁹Lu Decay Modes

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

¹⁸⁰Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	179.949890744 ± 0.000075926 Da
Mass Number	180
G-Factor
Half Life	5.7 ± 0.1 m
Spin	5
Quadrupole Moment
Discovery Year	1971
Parity	+

¹⁸⁰Lu Decay Modes

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

¹⁸¹Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	180.951908 ± 0.000135 Da
Mass Number	181
G-Factor
Half Life	3.5 ± 0.3 m
Spin	7/2
Quadrupole Moment
Discovery Year	1982
Parity	+

¹⁸¹Lu Decay Modes

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

¹⁸²Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	181.955158 ± 0.000215 Da
Mass Number	182
G-Factor
Half Life	2 ± 0.2 m
Spin	1
Quadrupole Moment
Discovery Year	1982
Parity	-

¹⁸²Lu Decay Modes

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

¹⁸³Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	182.957363 ± 0.000086 Da
Mass Number	183
G-Factor
Half Life	58 ± 4 s
Spin	7/2
Quadrupole Moment
Discovery Year	1983
Parity	+

¹⁸³Lu Decay Modes

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

¹⁸⁴Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	183.96103 ± 0.000215 Da
Mass Number	184
G-Factor
Half Life	20 ± 3 s
Spin	3
Quadrupole Moment
Discovery Year	1989
Parity	+

¹⁸⁴Lu Decay Modes

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

¹⁸⁵Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	184.963542 ± 0.000322 Da
Mass Number	185
G-Factor
Half Life
Spin	7/2
Quadrupole Moment
Discovery Year	2009
Parity	+

¹⁸⁵Lu Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%

¹⁸⁶Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	185.96745 ± 0.000429 Da
Mass Number	186
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year	2012
Parity

¹⁸⁶Lu Decay Modes

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

¹⁸⁷Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	186.970188 ± 0.000429 Da
Mass Number	187
G-Factor
Half Life
Spin	7/2
Quadrupole Moment
Discovery Year	2012
Parity	+

¹⁸⁷Lu Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	%

¹⁸⁸Lu

Abundance	Radioactive ☢️
Relative Atomic Mass	187.974428 ± 0.000429 Da
Mass Number	188
G-Factor
Half Life
Spin
Quadrupole Moment
Discovery Year	2012
Parity

¹⁸⁸Lu Decay Modes

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

History

French chemist Georges Urbain successfully separated lutetium from ytterbia in 1907 in Paris. Austrian scientist Carl Auer von Welsbach and American chemist Charles James also succeeded in isolating lutetium independently in the same year. Pure lutetium metal was first produced in 1953. Lutetia is the ancient name for Paris

Discoverers	Georges Urbain
Discovery Location	France
Discovery Year	1907
Etymology (Name Origin)	Named for the ancient name of Paris, Lutecia.
Pronunciation	loo-TEE-shi-em (English)

Lutetium is considered to be non toxic

Lutetium was the last natural rare earth element to be discovered

Uses

Lutetium oxide is used to make catalysts for cracking hydrocarbons in the petrochemical industry. Lutetium aluminum garnet has been proposed for use as a lens material in high refractive index immersion lithography. Lutetium is used as a phosphor in LED light bulbs. It has no practical applications.

Sources

Found with ytterbium in gadolinite and xenotime. Usually obtained from monazite sand which is ofter 50% rare earth by weight and 0.003% lutetium.

Abundance
Abundance in Earth's crust	0.8 mg/kg
Abundance in Oceans	0.00000015 mg/L
Abundance in Human Body
Abundance in Meteor	0.0000029 %
Abundance in Sun	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

Lutetium on ChemicalAid

Australian Educational Vocabulary ID	scot/3539
CAS Registry Number	7439-94-3
CPV Supplementary	AA24
ChEBI ID	33382
ChemSpider ID	22371
Common Procurement Vocabulary	14752000
DSSTOX compound identifier	DTXCID9027730
DSSTox substance ID	DTXSID5047746
Den Store Danske ID	lutetium
ECHA Substance Infocard ID	100.028.275
Elhuyar ZTH ID	027715
Encyclopædia Britannica Online ID	science/lutetium
Freebase ID	/m/025rz__
GND ID	4168341-9
Gran Enciclopèdia Catalana ID	0120691
Great Russian Encyclopedia Online ID	2162894
Hrvatska enciklopedija ID	37622
InChI	InChI=1S/Lu
InChIKey	OHSVLFRHMCKCQY-UHFFFAOYSA-N
KBpedia ID	Lutetium
Library of Congress authority ID	sh85078994
MeSH descriptor ID	D008187
NALT ID	50778
Namuwiki ID	루테튬
National Library of Israel J9U ID	987007538781805171
OmegaWiki Defined Meaning	161929
OpenAlex ID	C520551903
PubChem CID	23929
Quora topic ID	Lutetium
RxNorm ID	1534772
Römpp online ID	RD-12-01809
Store norske leksikon ID	lutetium
Treccani ID	lutezio
UNII	5H0DOZ21UJ
USGS Thesaurus ID	1497
WordNet 3.1 Synset ID	14668241-n

Lutetium (Lu)

Properties

Isotopes of Lutetium

150Lu

150Lu Decay Modes

151Lu

151Lu Decay Modes

152Lu

152Lu Decay Modes

153Lu

153Lu Decay Modes

154Lu

154Lu Decay Modes

155Lu

155Lu Decay Modes

156Lu

156Lu Decay Modes

157Lu

157Lu Decay Modes

158Lu

158Lu Decay Modes

159Lu

159Lu Decay Modes

160Lu

160Lu Decay Modes

161Lu

161Lu Decay Modes

162Lu

162Lu Decay Modes

163Lu

163Lu Decay Modes

164Lu

164Lu Decay Modes

165Lu

165Lu Decay Modes

166Lu

166Lu Decay Modes

167Lu

167Lu Decay Modes

168Lu

168Lu Decay Modes

169Lu

169Lu Decay Modes

170Lu

170Lu Decay Modes

171Lu

171Lu Decay Modes

172Lu

172Lu Decay Modes

173Lu

173Lu Decay Modes

174Lu

174Lu Decay Modes

175Lu

176Lu

176Lu Decay Modes

177Lu

177Lu Decay Modes

178Lu

178Lu Decay Modes

179Lu

179Lu Decay Modes

180Lu

180Lu Decay Modes

181Lu

181Lu Decay Modes

182Lu

182Lu Decay Modes

183Lu

183Lu Decay Modes

184Lu

184Lu Decay Modes

185Lu

185Lu Decay Modes

186Lu

186Lu Decay Modes

187Lu

187Lu Decay Modes

188Lu

188Lu Decay Modes