Stable isotope Dysprosium (Dy)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Dy-156 66 90 155.92428 0.06% 18.00-20.70% Oxide
Dy-158 66 92 157.924405 0.10% 14.10-23.70% Oxide
Dy-160 66 94 159.925194 2.34% 67.70-70.10% Oxide
Dy-161 66 95 160.926930 18.90% 92.20-93.50% Oxide
Dy-162 66 96 161.926795 25.50% >94.70% Oxide
Dy-163 66 97 162.928728 24.90% >94.50% Oxide
Dy-164 66 98 163.929171 28.20% 95.90-98.45% Oxide

Properties of Dysprosium

Name Dysprosium
Symbol Dy
Atomic number 66
Atomic weight 162.50
Standard state Solid at 298 ºK
CAS Registry ID 7429-91-6
Group in periodic table N/A
Group name Lanthanoid
Period in periodic table 6 (Lanthanoid)
Block in periodic table f-block
Color Silvery white
Classification Metallic
Melting point 1411 °C
Boiling point 2562 °C
Thermal conductivity 10.7 W/(m·K) at 298.2 ºK
Electrical resistivity 57.0 µΩ·cm at 25 ºC
Electronegativity 1.22
Specific heat 167 J/kg K
Heat of vaporization 280 kJ·mol-1
Heat of fusion 11.1 kJ·mol-1
Density of liquid 8.37 g/cm3 at 1411 °C
Density of solid 8.56 g/cm3
Electron configuration [Xe]4f95d16s2
Atomic volume 19.03 cm3/g atom
Atomic radius 1.773 Å
Ionic radius 0.908 Å
Most common oxidation state +3