Template:Infobox dysprosium

Dysprosium,  ₆₆Dy

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General properties
Pronunciation	Template:Infobox element/pronunciation
Appearance	silvery white
Standard atomic weight (Ar, standard)	Template:Infobox element/standard atomic weight
Mass number	Template:Infobox element/symbol-to-most-stable-isotope (most stable isotope)
Dysprosium in the periodic table
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Atomic number (Z)	66
Group	Template:Infobox element/group
Period	period 6
Block	f-block
Element category	Template:Infobox element/category format
Electron configuration	[Xe] 4f10 6s2
Electrons per shell	2, 8, 18, 28, 8, 2
Physical properties
Phase at STP	solid
Melting point	1680 K ​(1407 °C, ​2565 °F)
Boiling point	2840 K ​(2562 °C, ​4653 °F)
Density (near r.t.)	8.540 g/cm3
when liquid (at m.p.)	8.37 g/cm3
Heat of fusion	11.06 kJ/mol
[[Enthalpy of vaporization|Heat of Template:Engvar]]	280 kJ/mol
Molar heat capacity	27.7 J/(mol·K)
[[Vapor pressure|Template:Engvar pressure]] Template:Infobox element/vapor pressure table
Atomic properties
Oxidation states	Template:Infobox element/symbol-to-oxidation-state
Electronegativity	Pauling scale: 1.22
[[Ionization energy|Template:Engvar energies]]	1st: 573.0 kJ/mol 2nd: 1130 kJ/mol 3rd: 2200 kJ/mol
Atomic radius	empirical: 178 pm
Covalent radius	192±7 pm
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Other properties
Crystal structure	​Template:Infobox element/crystal structure Template:Infobox element/crystal structure
Speed of sound thin rod	2710 m/s (at 20 °C)
Thermal expansion	α, poly: 9.9 µm/(m·K) (r.t.)
Thermal conductivity	10.7 W/(m·K)
Electrical resistivity	α, poly: 926 nΩ·m (r.t.)
Magnetic ordering	paramagnetic at 300 K
Magnetic susceptibility	+103,500·10−6 cm3/mol (293.2 K)
Young's modulus	α form: 61.4 GPa
Shear modulus	α form: 24.7 GPa
Bulk modulus	α form: 40.5 GPa
Poisson ratio	α form: 0.247
Vickers hardness	410–550 MPa
Brinell hardness	500–1050 MPa
CAS Number	7429-91-6
History
Discovery	Lecoq de Boisbaudran (1886)
Main isotopes of dysprosium
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