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Name: Neodymium Symbol: Nd
Group: Rare Earth, Lanthanides 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


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

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:

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


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