Disprosyo

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Dysprosium
66Dy
-

Dy

Cf
terbiumdysprosiumholmium
Appearance
silvery white
General properties
Name, simbolo, kaiphan dysprosium, Dy, 66
Pronunciation Plantilya:IPAc-en
Plantilya:Respell
Element category puthaw nga lantanido
Group, period, block n/a6, f
Standard atomic weight 162.500
Electron configuration [Xe] 4f10 6s2
2, 8, 18, 28, 8, 2
Electron shells of dysprosium (2, 8, 18, 28, 8, 2)
History
Discovery Lecoq de Boisbaudran (1886)
Physical properties
Phase magahi
Density (near r.t.) 8.540 g·cm−3
Liquid density at m.p. 8.37 g·cm−3
Melting point 1680 K, 1407 °C, 2565 °F
Boiling point 2840 K, 2562 °C, 4653 °F
Heat of fusion 11.06 kJ·mol−1
Heat of vaporization 280 kJ·mol−1
Molar heat capacity 27.7 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1378 1523 (1704) (1954) (2304) (2831)
Atomic properties
Oxidation states 3, 2, 1

(weakly basic oxide)

Electronegativity 1.22 (Pauling scale)
Ionization energies 1st: 573.0 kJ·mol−1
2nd: 1130 kJ·mol−1
3rd: 2200 kJ·mol−1
Atomic radius 178 pm
Covalent radius 192±7 pm
Miscellanea
Crystal structure hexagonal
Dysprosium has a hexagonal crystal structure
Magnetic ordering paramagnetic at 300 K
Electrical resistivity (r.t.) (α, poly) 926 nΩ·m
Thermal conductivity 10.7 W·m−1·K−1
Thermal expansion (r.t.) (α, poly) 9.9 µm/(m·K)
Speed of sound (thin rod) (20 °C) 2710 m·s−1
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 540 MPa
Brinell hardness 500 MPa
CAS registry number 7429-91-6
Most stable isotopes
Main article: Isotopes of dysprosium
iso NA half-life DM DE (MeV) DP
154Dy syn 3.0×106 y α 2.947 150Gd
156Dy 0.06% >1×1018 y α 2.0108 152Gd
β+β+ 1.7579 156Gd
158Dy 0.10% 158Dy is stable with 92 neutrons
160Dy 2.34% 160Dy is stable with 94 neutrons
161Dy 18.91% 161Dy is stable with 95 neutrons
162Dy 25.51% 162Dy is stable with 96 neutrons
163Dy 24.90% 163Dy is stable with 97 neutrons
164Dy 28.18% 164Dy is stable with 98 neutrons
t  h  u
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Ang disprosyo (Iningles dysprosium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Dy ug kaiphan nga atomik 66. Ang disprosyo mao ang puthaw nga lantanido.

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