Chemicool

Dy

66 
162.50
Dysprosium
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General

Name Dysprosium Symbol Dy
atomic number 66  Atomic weight 162.50
Density @ 293 K 8.536 g/cm3 Atomic volume 19.0 cm3/mol
Group Rare Earth, Lanthanides discovered 1886 

States

state (s, l, g) s 
melting point 1682.2 K boiling point 2873 K
Heat of fusion 11.060 kJ/mol Heat of vaporization 230.0 kJ/mol
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Energies

1st ionization energy 571.9 kJ/mole electronegativity 1.2 
2nd ionization energy 1126 kJ/mole electron affinity 50 kJ/mole
3rd ionization energy 2200 kJ/mole Specific heat 0.17 J/gK
heat atomization 291 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,18,28,8,2 electron configuration [Xe] 4f10 6s2 
minimum oxidation number 0  maximum oxidation number 3 
min. common oxidation no. 0  max. common oxidation no. 3 
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Appearance & Characteristics

structure hcp: hexagonal close pkd  color silvery-white 
uses alloys, CD disk  toxicity
hardness mohs characteristics neutron absorber 

Reactions

reaction with air vigorous, =>Dy2O3  reaction with 6M HCl mild, =>H2, DyCl3 
reaction with 6M HCl mild, =>H2, DyCl3  reaction with 15M HNO3 mild, =>Dy(NO3)3 
reaction with 6M NaOH
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Other Forms

number of isotopes 7  hydride(s) DyH2 DyH3 
oxide(s) Dy2O3  chloride(s) DyCl2 DyCl3 

Radius

ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 178 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) 121 pm ionic radius (3+ ion) 105.2 pm
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Conductivity

thermal conductivity 10.7 J/m-sec-deg electrical conductivity 10 1/mohm-cm
polarizability 24.5 A^3

Abundance

source Monazite(phosphate),bastnaesite  rel. abund. solar system -0.404 log
abundance earth's crust 0.5 log cost, pure 210 $/100g
cost, bulk $/100g
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