Chemicool

Nd

60

144.24
Neodymium
General | States | Energies | Oxidation & Electrons |Appearance & Characteristics
Reactions | Other Forms |Radius | Conductivity | Abundance
Encyclopedia Britannica articles

General

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

States

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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Energies

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

Reactions

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

Radius

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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Conductivity

thermal conductivity 16.5 J/m-sec-deg electrical conductivity 15.4 1/mohm-cm
polarizability 31.4 A^3

Abundance

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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