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


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


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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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


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


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


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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World Wide Web presentation of Chemicool Periodic Table is © Copyright 1996-99 by David D. Hsu. Some data were provided by and used with the permission of JCE Software and is owned and copyright by the Division of Chemical Education, Inc. Additional data were provided by Perkin-Elmer through Peter Lykos of IIT. The information may not be redistributed without the permission of David Hsu or JCE Software.