Dysprosium (Dy)

Dysprosium is the 66th element in the periodic table and has a symbol of Dy and atomic number of 66. It has an atomic weight of 162.500 and a mass number of 164. Dysprosium has sixty-six protons and ninety-eight neutrons in its nucleus, and sixty-six electrons in six shells. It is located in group zero, period six and block f of the periodic table. Metallic with a bright silvery-white lustre. Dysprosium belongs to the lanthanoids. It is relatively stable in air at room temperatures, it will however dissolve in mineral acids, evolving hydrogen. It is found in from rare-earth minerals. There are seven natural isotopes of dysprosium, and eight radioisotopes, Dy-154 being the most stable with a half-life of 3*10^6 years. Dysprosium is used as a neutron absorber in nuclear fission reactions, and in compact disks. It was discovered by Paul Emile Lecoq de Boisbaudran in 1886 in France. Its name comes from the Greek word dysprositos, which means hard to obtain.

Atomic Number	66
Atomic Weight	162.5
Mass Number	164

Group
Period	6
Block	f

Protons	66 p⁺
Neutrons	98 n⁰
Electrons	66 e^-

Properties

Physical Properties
Atomic Radius	175 pm 275 pm
Molar Volume	19 cm³/mol
Covalent Radius	167 pm 133 pm 192 pm
Metallic Radius
Ionic Radius	107 pm 113 pm 119 pm 91.2 pm 97 pm 102.7 pm 108.3 pm
Crystal Radius	121 pm 127 pm 133 pm 105.2 pm 111 pm 116.7 pm 122.3 pm
Van der Waals Radius	231 pm 290 pm 342.8 pm
Density	8.55 g/cm³ 8,370 kg/m³
Energy
Proton Affinity
Electron Affinity	0.352 eV/particle
Ionization Energy	5.93905 eV/particle 11.67 eV/particle 22.93 eV/particle 41.4 eV/particle 62.08 eV/particle 93 eV/particle 110 eV/particle 127 eV/particle 152 eV/particle 170 eV/particle 192 eV/particle 224 eV/particle 259 eV/particle 279 eV/particle 300 eV/particle 332 eV/particle 366 eV/particle 399 eV/particle 431 eV/particle 465 eV/particle 664 eV/particle 702 eV/particle 743 eV/particle 786 eV/particle 827 eV/particle 872 eV/particle 924 eV/particle 969 eV/particle 1,014 eV/particle 1,059 eV/particle 1,232 eV/particle 1,275 eV/particle 1,325 eV/particle 1,371 eV/particle 1,468 eV/particle 1,520 eV/particle 1,638 eV/particle 1,691.74 eV/particle 2,882 eV/particle 2,987 eV/particle 3,098 eV/particle 3,217 eV/particle 3,331 eV/particle 3,445 eV/particle 3,607 eV/particle 3,725 eV/particle 3,852 eV/particle 3,970 eV/particle 4,303 eV/particle 4,407 eV/particle 4,523 eV/particle 4,629 eV/particle 4,945 eV/particle 5,066 eV/particle 5,296 eV/particle 5,412 eV/particle 12,081 eV/particle 12,370 eV/particle 12,690 eV/particle 12,986 eV/particle 14,144 eV/particle 14,495 eV/particle 14,936 eV/particle 15,228.06 eV/particle 61,736.55 eV/particle 63,073.5 eV/particle

Heat of Vaporization	291 kJ/mol
Heat of Fusion
Heat of Formation	290.4 kJ/mol
Electrons
Electron Shells	2, 8, 18, 28, 8, 2

Valence Electrons	2

Electron Configuration	[Xe] 4f¹⁰ 6s²

Oxidation States	0, 2, 3, 4
Electronegativity	0.20333 1.22
Electrophilicity	0.8854697492974827 eV/particle
Phases
Phase	Solid
Gas Phase
Boiling Point	2,840.15 K
Melting Point	1,685.15 K
Critical Pressure
Critical Temperature
Triple Point
Visual
Dysprosium is a Silver. Dy has a CPK of #ff1493, Jmol of #1fffc7, and MOLCAS GV of #1fffc7. The Appearance of Element 66 is silvery white.
Color	Silver #ff1493 #1fffc7 #1fffc7
Appearance	silvery white
Refractive Index
Thermodynamic Properties
Thermal Conductivity	10.7 W/(m K)
Thermal Expansion	0.00001 1/K
Molar Heat Capacity	28.16 J/(mol K)
Specific Heat Capacity	0.173 J/(g⋅K)
Heat Capacity Ratio (Adiabatic Index)
Electrical Properties
Type	Conductor
Electrical Conductivity	1.1 MS/m
Electrical Resistivity	0.00000091 m Ω
Superconducting Point
Magnetism
Type	paramagnetic
Magnetic Susceptibility (Mass)	0.00000545 m³/Kg
Magnetic Susceptibility (Molar)	0.000000885625 m³/mol
Magnetic Susceptibility (Volume)	0.046603
Magnetic Ordering
Curie Point	87 K
Neel Point	178 K
Structure
The Crystal Structure of Dysprosium is HEX. The lattice constant of Dy is 3.59 Å. The lattice angles of Element 66 are π/2, π/2, 2 π/3.
Crystal Structure	Simple Hexagonal (HEX)
Lattice Constant	3.59 Å
Lattice Angles	π/2, π/2, 2 π/3
Mechanical Properties
Dysprosium has a Brinell of 500 MPa, and Vickers of 540 MPa. The Bulk Modulus of Dy is 41 GPa. The Shear Modulus of Element 66 is 25 GPa. The Young Modulus of Dysprosium (Dy) is 61 GPa. The Poisson Ratio of Dysprosium is 0.25. The Speed of Sound of Dy is 2710 m/s.
Hardness	500 MPa 540 MPa
Bulk Modulus	41 GPa
Shear Modulus	25 GPa
Young Modulus	61 GPa
Poisson Ratio	0.25
Speed of Sound	2,710 m/s
Classification
The Glawe Number of Dysprosium is 24. The Mendeleev Number of Dy is 31. The Pettifor Number of Element 66 is 25. The Geochemical Class of Dysprosium (Dy) is rare earth & related. The Goldschmidt Class of Dysprosium is litophile.
Category	Lanthanides, Lanthanides
CAS Group
IUPAC Group
Glawe Number	24
Mendeleev Number	31
Pettifor Number	25
Geochemical Class	rare earth & related
Goldschmidt Class	litophile
Other
The Dipole Polarizability of Dysprosium is 163 plus or minus 15 a₀. Dy has a C6 Dispersion Coefficient (GB) of 2430 a₀. The Allotropes of Element 66 is . The Neutron Cross Section of Dysprosium (Dy) is 950. The Neutron Mass Absorption of Dysprosium is 0.2. The Quantum Numbers of Dy is 5I8. The Space Group of Element 66 is 194 (P63/mmc).
Gas Basicity
Dipole Polarizability	163 ± 15 a₀
C6 Dispersion Coefficient	2,430 a₀
Allotropes
Neutron Cross Section	950
Neutron Mass Absorption	0.2
Quantum Numbers	5I8
Space Group	194 (P63/mmc)

Isotopes of Dysprosium

Stable Isotopes	7
Unstable Isotopes	32
Radioactive Isotopes	32

¹³⁸Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	137.9625 ± 0.00054 Da
Mass Number	138
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year
Parity	+

¹³⁸Dy Decay Modes

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

¹³⁹Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	138.959527 ± 0.000537 Da
Mass Number	139
G-Factor
Half Life	600 ± 200 ms
Spin	7/2
Quadrupole Moment
Discovery Year	1999
Parity	+

¹³⁹Dy Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	11%

¹⁴⁰Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	139.95402 ± 0.00043 Da
Mass Number	140
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2002
Parity	+

¹⁴⁰Dy Decay Modes

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

¹⁴¹Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	140.95128 ± 0.00032 Da
Mass Number	141
G-Factor
Half Life	900 ± 140 ms
Spin	9/2
Quadrupole Moment
Discovery Year	1984
Parity	-

¹⁴¹Dy Decay Modes

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

¹⁴²Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	141.946194 ± 0.000782 Da
Mass Number	142
G-Factor	0
Half Life	2.3 ± 0.3 s
Spin	0
Quadrupole Moment	0
Discovery Year	1986
Parity	+

¹⁴²Dy Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
e⁺ (positron emission)	90%
ϵ (electron capture)	10%
β⁺ p (β⁺-delayed proton emission)	0.06%

¹⁴³Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	142.943994332 ± 0.000014 Da
Mass Number	143
G-Factor
Half Life	5.6 ± 1 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1983
Parity	+

¹⁴³Dy Decay Modes

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

¹⁴⁴Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	143.939269512 ± 0.0000077 Da
Mass Number	144
G-Factor	0
Half Life	9.1 ± 0.4 s
Spin	0
Quadrupole Moment	0
Discovery Year	1986
Parity	+

¹⁴⁴Dy Decay Modes

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

¹⁴⁵Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	144.937473992 ± 0.000007 Da
Mass Number	145
G-Factor
Half Life	9.5 ± 1 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1982
Parity	+

¹⁴⁵Dy Decay Modes

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

¹⁴⁶Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	145.932844526 ± 0.000007187 Da
Mass Number	146
G-Factor	0
Half Life	33.2 ± 0.7 s
Spin	0
Quadrupole Moment	0
Discovery Year	1981
Parity	+

¹⁴⁶Dy Decay Modes

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

¹⁴⁷Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	146.931082712 ± 0.0000095 Da
Mass Number	147
G-Factor	-1.83 ± 0.018
Half Life	67 ± 7 s
Spin	1/2
Quadrupole Moment	0
Discovery Year	1975
Parity	+

¹⁴⁷Dy Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	100%
β⁺ p (β⁺-delayed proton emission)	0.05%

¹⁴⁸Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	147.927149944 ± 0.000009365 Da
Mass Number	148
G-Factor	0
Half Life	3.3 ± 0.2 m
Spin	0
Quadrupole Moment	0
Discovery Year	1974
Parity	+

¹⁴⁸Dy Decay Modes

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

¹⁴⁹Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	148.927327516 ± 0.000009858 Da
Mass Number	149
G-Factor	-0.034 ± 0.002
Half Life	4.2 ± 0.14 m
Spin	7/2
Quadrupole Moment	-0.62 ± 0.05
Discovery Year	1958
Parity	-

¹⁴⁹Dy Decay Modes

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

¹⁵⁰Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	149.925593068 ± 0.000004636 Da
Mass Number	150
G-Factor	0
Half Life	7.17 ± 0.05 m
Spin	0
Quadrupole Moment	0
Discovery Year	1959
Parity	+

¹⁵⁰Dy Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	66.4%
α (α emission)	33.6%

¹⁵¹Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	150.926191279 ± 0.000003486 Da
Mass Number	151
G-Factor	-0.27 ± 0.002
Half Life	17.9 ± 0.3 m
Spin	7/2
Quadrupole Moment	-0.3 ± 0.05
Discovery Year	1959
Parity	-

¹⁵¹Dy Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	94.4%
α (α emission)	5.6%

¹⁵²Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	151.924725274 ± 0.00000493 Da
Mass Number	152
G-Factor	0
Half Life	2.38 ± 0.02 h
Spin	0
Quadrupole Moment	0
Discovery Year	1958
Parity	+

¹⁵²Dy Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	99.9%
α (α emission)	0.1%

¹⁵³Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	152.925771729 ± 0.000004295 Da
Mass Number	153
G-Factor	-0.20342857142857 ± 0.0017142857142857
Half Life	6.4 ± 0.1 h
Spin	7/2
Quadrupole Moment	-0.15 ± 0.09
Discovery Year	1958
Parity	-

¹⁵³Dy Decay Modes

Decay Mode	Intensity
β⁺ (β⁺ decay; β⁺ = ϵ + e⁺)	99.9906%
α (α emission)	0.0094%

¹⁵⁴Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	153.92442892 ± 0.000007977 Da
Mass Number	154
G-Factor	0
Half Life	3 ± 1.5 My
Spin	0
Quadrupole Moment	0
Discovery Year	1961
Parity	+

¹⁵⁴Dy Decay Modes

Decay Mode	Intensity
α (α emission)	100%
2β⁺ (double β⁺ decay)	%

¹⁵⁵Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	154.925758049 ± 0.000010354 Da
Mass Number	155
G-Factor	-0.22466666666667 ± 0.002
Half Life	9.9 ± 0.2 h
Spin	3/2
Quadrupole Moment	0.96 ± 0.02
Discovery Year	1958
Parity	-

¹⁵⁵Dy Decay Modes

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

¹⁵⁶Dy

Abundance	0.056 ± 0.003
Relative Atomic Mass	155.924283593 ± 0.00000106 Da
Mass Number	156
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1948
Parity	+

¹⁵⁶Dy Decay Modes

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

¹⁵⁷Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	156.925469555 ± 0.000005532 Da
Mass Number	157
G-Factor	-0.20066666666667 ± 0.0013333333333333
Half Life	8.14 ± 0.04 h
Spin	3/2
Quadrupole Moment	1.29 ± 0.02
Discovery Year	1953
Parity	-

¹⁵⁷Dy Decay Modes

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

¹⁵⁸Dy

Abundance	0.095 ± 0.003
Relative Atomic Mass	157.924414817 ± 0.000002509 Da
Mass Number	158
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1938
Parity	+

¹⁵⁸Dy Decay Modes

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

¹⁵⁹Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	158.925745938 ± 0.000001544 Da
Mass Number	159
G-Factor	-0.236 ± 0.002
Half Life	144.4 ± 0.2 d
Spin	3/2
Quadrupole Moment	1.37 ± 0.02
Discovery Year	1951
Parity	-

¹⁵⁹Dy Decay Modes

Decay Mode	Intensity
ϵ (electron capture)	100%

¹⁶⁰Dy

Abundance	2.329 ± 0.018
Relative Atomic Mass	159.925203578 ± 0.000000751 Da
Mass Number	160
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1938
Parity	+

¹⁶¹Dy

Abundance	18.889 ± 0.042
Relative Atomic Mass	160.926939425 ± 0.000000748 Da
Mass Number	161
G-Factor	-0.1916 ± 0.0012
Half Life
Spin	5/2
Quadrupole Moment	2.51 ± 0.02
Discovery Year	1934
Parity	+

¹⁶²Dy

Abundance	25.475 ± 0.036
Relative Atomic Mass	161.926804507 ± 0.000000746 Da
Mass Number	162
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1934
Parity	+

¹⁶³Dy

Abundance	24.896 ± 0.042
Relative Atomic Mass	162.928737221 ± 0.000000744 Da
Mass Number	163
G-Factor	0.2684 ± 0.0016
Half Life
Spin	5/2
Quadrupole Moment	2.65 ± 0.02
Discovery Year	1934
Parity	-

¹⁶⁴Dy

Abundance	28.26 ± 0.054
Relative Atomic Mass	163.929180819 ± 0.000000746 Da
Mass Number	164
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	1934
Parity	+

¹⁶⁵Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	164.931709402 ± 0.000000748 Da
Mass Number	165
G-Factor	-0.148 ± 0.0017142857142857
Half Life	2.332 ± 0.004 h
Spin	7/2
Quadrupole Moment	3.48 ± 0.07
Discovery Year	1935
Parity	+

¹⁶⁵Dy Decay Modes

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

¹⁶⁶Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	165.93281281 ± 0.000000862 Da
Mass Number	166
G-Factor	0
Half Life	81.6 ± 0.1 h
Spin	0
Quadrupole Moment	0
Discovery Year	1949
Parity	+

¹⁶⁶Dy Decay Modes

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

¹⁶⁷Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	166.935682415 ± 0.0000043 Da
Mass Number	167
G-Factor
Half Life	6.2 ± 0.08 m
Spin	1/2
Quadrupole Moment	0
Discovery Year	1960
Parity	-

¹⁶⁷Dy Decay Modes

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

¹⁶⁸Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	167.937134977 ± 0.000150303 Da
Mass Number	168
G-Factor	0
Half Life	8.7 ± 0.3 m
Spin	0
Quadrupole Moment	0
Discovery Year	1982
Parity	+

¹⁶⁸Dy Decay Modes

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

¹⁶⁹Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	168.940315231 ± 0.000322781 Da
Mass Number	169
G-Factor
Half Life	39 ± 8 s
Spin	5/2
Quadrupole Moment
Discovery Year	1990
Parity

¹⁶⁹Dy Decay Modes

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

¹⁷⁰Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	169.94234 ± 0.000215 Da
Mass Number	170
G-Factor	0
Half Life	54.9 ± 8 s
Spin	0
Quadrupole Moment	0
Discovery Year	2010
Parity	+

¹⁷⁰Dy Decay Modes

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

¹⁷¹Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	170.946312 ± 0.000215 Da
Mass Number	171
G-Factor
Half Life	4.07 ± 0.4 s
Spin	7/2
Quadrupole Moment
Discovery Year	2012
Parity	-

¹⁷¹Dy Decay Modes

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

¹⁷²Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	171.948728 ± 0.000322 Da
Mass Number	172
G-Factor	0
Half Life	3.4 ± 0.2 s
Spin	0
Quadrupole Moment	0
Discovery Year	2012
Parity	+

¹⁷²Dy Decay Modes

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

¹⁷³Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	172.953043 ± 0.000429 Da
Mass Number	173
G-Factor
Half Life	1.43 ± 0.2 s
Spin	9/2
Quadrupole Moment
Discovery Year	2012
Parity	+

¹⁷³Dy Decay Modes

Decay Mode	Intensity
β⁻ (β⁻ decay)	100%
β⁻ n (β⁻-delayed neutron emission)	%

¹⁷⁴Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	173.955845 ± 0.000537 Da
Mass Number	174
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2012
Parity	+

¹⁷⁴Dy Decay Modes

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

¹⁷⁵Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	174.960569 ± 0.000537 Da
Mass Number	175
G-Factor
Half Life
Spin	1/2
Quadrupole Moment	0
Discovery Year	2018
Parity	-

¹⁷⁵Dy Decay Modes

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

¹⁷⁶Dy

Abundance	Radioactive ☢️
Relative Atomic Mass	175.963918 ± 0.000537 Da
Mass Number	176
G-Factor	0
Half Life
Spin	0
Quadrupole Moment	0
Discovery Year	2018
Parity	+

¹⁷⁶Dy Decay Modes

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

History

French chemist Paul Émile Lecoq de Boisbaudran, while working with holmium oxide, separated dysprosium oxide from it in Paris in 1886. His procedure for isolating the dysprosium involved dissolving dysprosium oxide in acid, then adding ammonia to precipitate the hydroxide. It was not isolated in pure form until the development of ion exchange techniques in the 1950s. From the Greek word dysprositos, meaning hard to get at

Discoverers	Paul Émile Lecoq de Boisbaudran
Discovery Location	France
Discovery Year	1886
Etymology (Name Origin)	Greek: dysprositos (hard to get at).
Pronunciation	dis-PRO-si-em (English)

Dysprosium is considered to be moderately toxic

Naturally occurring dysprosium is composed of 7 isotopes

Uses

Dysprosium oxide-nickel cermets are used in neutron-absorbing control rods in nuclear reactors. Dysprosium is used in data storage applications such as compact discs and hard discs. It is also used in dosimeters for measuring ionizing radiation. Dysprosium iodide and dysprosium bromide are used in high intensity metal-halide lamps. Its uses are limited to the experimental and esoteric.

Sources

Usually found with erbium, holmium and other rare earths in some minerals such as monazite sand, which is often 50% rare earth by weight.

Abundance
Abundance in Earth's crust	5.2 mg/kg
Abundance in Oceans	0.00000091 mg/L
Abundance in Human Body
Abundance in Meteor	0.000027 %
Abundance in Sun	0.0000002 %
Abundance in Universe	0.0000002 %

Nuclear Screening Constants

1	s	1.2914
2	p	4.3204
2	s	17.2906
3	d	13.6701
3	p	20.1195
3	s	20.6067
4	d	34.982
4	f	39.464
4	p	32.174
4	s	31.408
5	p	48.873
5	s	46.696
6	s	57.6564

Dysprosium on ChemicalAid

ATC code	V10AX03
Australian Educational Vocabulary ID	scot/3515
CAS Registry Number	7429-91-6
ChEBI ID	33377
ChemSpider ID	22355
DSSTOX compound identifier	DTXCID3047631
DSSTox substance ID	DTXSID5064673
Den Store Danske ID	dysprosium
ECHA Substance Infocard ID	100.028.249
Elhuyar ZTH ID	022514
Encyclopædia Britannica Online ID	science/dysprosium
Encyclopædia Universalis ID	dysprosium
Freebase ID	/m/026rjl1
GND ID	4150953-5
Great Russian Encyclopedia Online ID	1958976
InChI	InChI=1S/Dy
InChIKey	KBQHZAAAGSGFKK-UHFFFAOYSA-N
KBpedia ID	Dysprosium
Library of Congress authority ID	sh85040345
MeSH descriptor ID	D004419
NALT ID	35045
Namuwiki ID	디스프로슘
National Library of Israel J9U ID	987007567963505171
OmegaWiki Defined Meaning	157663
OpenAlex ID	C525727330
PubChem CID	23912
RxNorm ID	1311482
Römpp online ID	RD-04-02914
Store norske leksikon ID	dysprosium
Treccani ID	disprosio
UNII	1D4N45714Q
USGS Thesaurus ID	1444
WordNet 3.1 Synset ID	14660825-n
YSO ID	38603
ZVG number	7660

Dysprosium (Dy)

Properties

Isotopes of Dysprosium

138Dy

138Dy Decay Modes

139Dy

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140Dy

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141Dy

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142Dy

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143Dy

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144Dy

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145Dy

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146Dy

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147Dy

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148Dy

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149Dy

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150Dy

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151Dy

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152Dy

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153Dy

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154Dy

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155Dy

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156Dy

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157Dy

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158Dy

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159Dy

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160Dy

161Dy

162Dy

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164Dy

165Dy

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167Dy

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168Dy

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169Dy

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170Dy

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171Dy

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172Dy

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173Dy

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174Dy

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175Dy

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176Dy

176Dy Decay Modes