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


Name Neodymium Symbol Nd
atomic number 60 Atomic weight 144.24
Density @ 293 K 7.0 g/cm3 Atomic volume 20.6 cm3/mol
Group Rare Earth, Lanthanides discovered 1885


state (s, l, g) s
melting point 1283.2 K boiling point 3300 K
Heat of fusion 7.140 kJ/mol Heat of vaporization 273.0 kJ/mol
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1st ionization energy 529.6 kJ/mole electronegativity 1.14
2nd ionization energy 1035 kJ/mole electron affinity 50 kJ/mole
3rd ionization energy 2130 kJ/mole Specific heat 0.19 J/gK
heat atomization 328 kJ/mole atoms

Oxidation & Electrons

Shells 2,8,18,22,8,2 electron configuration [Xe] 4f4 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 cp: close packed (ABCB) color silvery-white
uses alloys, Welder's mask toxicity
hardness mohs characteristics


reaction with air vigorous, w/ht = Nd2O3 reaction with 6M HCl mild, = H2, NdCl3
reaction with 6M HCl mild, = H2, NdCl3 reaction with 15M HNO3 mild, = Nd(NO3)3
reaction with 6M NaOH
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Other Forms

number of isotopes 7 hydride(s) NdH2 NdH3
oxide(s) Nd2O3 chloride(s) NdCl2 NdCl3


ionic radius (2- ion) pm ionic radius (1- ion) pm
atomic radius 181 pm ionic radius (1+ ion) pm
ionic radius (2+ ion) pm ionic radius (3+ ion) 112.3 pm
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thermal conductivity 16.5 J/m-sec-deg electrical conductivity 15.4 1/mohm-cm
polarizability 31.4 A^3


source Monazite(phosphate),bastnaesite rel. abund. solar system -0.082 log
abundance earth's crust 1.4 log cost, pure 110 $/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.