Neodymium Elemental Symbol

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Néodyme Neodym Neodimio Neodímio Neodimio Neodym

Neodymium (Nd) atomic and molecular weight, atomic number and elemental symbolNeodymium is a Block F, Group 3, Period 6 element. Neodymium Bohr ModelThe number of electrons in each of Neodymium's shells is 2, 8, 18, 22, 8, 2 and its electron configuration is [Xe] 4f4 6s2. The neodymium atom has a radius of and its Van der Waals radius is In its elemental form, CAS 7440-00-8, neodymium has a silvery-white appearance. Neodymium is the most abundant of the rare earths after cerium and lanthanum. Neodymium is found in monazite and bastnäsite ores. Neodymium was first discovered by Carl Aer von Welsbach in 1885. The name originates from the Greek words ‘neos didymos’, meaning new twin.

Elemental NeodymiumPrimary applications include lasers, glass coloring and tinting, dielectrics and, most importantly, as the fundamental basis for neodymium-iron-boron permanent magnets. Neodymium has a strong absorption band centered at 580 nm, which is very close to the human eye's maximum level of sensitivity making it useful in protective lenses for welding goggles. It is also used in CRT displays to enhance contrast between reds and greens and highly valued in glass manufacturing for its attractive purple coloring. Neodymium is included in many formulations of barium titanate, used as dielectric coatings and in multi-layer capacitors essential to electronic equipment. Neodymium is available as metal and compounds with purities from 99% to 99.999% (ACS grade to ultra-high purity). High Purity (99.999%) Neodymium Oxide (Nd2O3) PowderElemental or metallic forms include pellets, rod, wire and granules for evaporation source material purposes. Neodymium nanoparticles and nanopowders provide ultra-high surface area which nanotechnology research and recent experiments demonstrate function to create new and unique properties and benefits. High Purity (99.999%) Neodymium (Nd) Sputtering TargetOxides are available in powder and dense pellet form for such uses as optical coating and thin film applications. Oxides tend to be insoluble. Fluorides are another insoluble form for uses in which oxygen is undesirable such as metallurgy, chemical and physical vapor deposition and in some optical coatings. Neodymium is also available in soluble forms including chlorides, nitrates and acetates. These compounds can be manufactured as solutions at specified stoichiometries.

Safety data for Neodymium and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the Products tab below.

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Neodymium Properties

Symbol: Nd Melting Point: 1016 oC, 1860.8 oF, 1289.15 K
Atomic Number: 60 Boiling Point: 3074 oC, 5565.2 oF, 3347.15 K
Atomic Weight: 144.2 Density: 7.01 g·cm−3
Element Category: Lanthanides Liquid Density @ Melting Point: 6.89 g·cm−3
Group, Period, Block: n/a, 6, f Specific Heat: 0.049 Cal/g/K @ 25°C
    Heat of Vaporization 69 K-Cal/gm atom at 3068°C
CHEMICAL STRUCTURE Heat of Fusion 1.70 Cal/gm mole
Electrons: 60 Thermal Conductivity: 0.165 W/cm/K @ 298.2 K
Protons: 60 Thermal Expansion: 6.89 g·cm−3
Neutrons: 84 Electrical Resistivity: 64.0 microhm-cm @ 25°C
Electron Configuration: [Xe] 4f46s2 Electronegativity: 1.2 Paulings
Atomic Radius: 181 pm Tensile Strength: N/A
Covalent Radius: 201±6 pm Molar Heat Capacity: 27.45 J·mol−1·K−1
Van der Waals radius: 229 pm Young's Modulus: (α form) 41.4 GPa
Oxidation States: 3, 2, 1 (mildly basic oxide) Shear Modulus: (α form) 16.3 GPa
Phase: Solid Bulk Modulus: (α form) 31.8 GPa
Crystal Structure: hexagonal Poisson Ratio: (α form) 0.281
Magnetic Ordering: paramagnetic Mohs Hardness: N/AQ
1st Ionization Energy: 533.09 kJ mol-1 Vickers Hardness: 343 MPa
2nd Ionization Energy: 1035.30 kJ mol-1 Brinell Hardness: 265 MPa
3rd Ionization Energy: 2132.34 kJ mol-1 Speed of Sound: (20 °C) 2330 m·s−1
CAS Number: 7440-00-8 Abundance in typical human body, by weight: N/A
ChemSpider ID: 22376 Abundance in typical human body, by atom: N/A
PubChem CID: 23934 Abundance in universe, by weight: 10 ppb
MDL Number: MFCD00011130 Abundance in universe, by atom: 0.09 ppb
EC Number: 231-109-3 Discovered By: Carl Auer von Welsbach
Beilstein Number: N/A Discovery Date: 1885
SMILES Identifier: [Nd]  
InChI Identifier: InChI=1S/Nd Other Names: Néodyme, Neodym, Neodimio

Health, Safety & Transportation Information for Neodymium

Material Safety Data Sheet MSDS
Signal Word Danger
Hazard Statements H260-H315-H319-H335
Hazard Codes F,Xi
Risk Codes 11-14/15-36/37/3
Safety Precautions 16-26-33-36/37/39-43
RTECS Number QO8575000
Transport Information UN 3208 4.3/PG
WGK Germany 3
Globally Harmonized System of
Classification and Labelling (GHS)
Exclamation Mark-Acute Toxicity Flame-Flammables  

Neodymium Products

Metal Forms  •  Compounds  •  Alloys  •  Oxide Forms  •  Organometallic Compounds
Sputtering Targets  •  Nanomaterials  •  Semiconductor Materials •  Isotopes


Didymium Oxide
Neodymium Acetate
Neodymium Acetate Solution
Neodymium Aluminide
Neodymium Boride
Neodymium(II) Bromide NdBr2
Neodymium( III) Bromide NdBr3
Neodymium(III) Bromide Hydrate
Neodymium Bromide, Ultra Dry NdBr3
Neodymium Calcium Aluminate
Neodymium Carbide
Neodymium Carbonate
Neodymium(III) Carbonate Hydrate
Neodymium Chloride
Neodymium Chloride, Anhydrous
Neodymium(III) Chloride Hexahydrate
Neodymium Chloride, Ultra Dry
Neodymium Chloride Solution
Neodymium Fluoride
Neodymium Fluoride Granules
Neodymium Fluoride Pieces
Neodymium Gallium Oxide
Neodymium Hydride NdH2
Neodymium Hydride NdH3
Neodymium Hydroxide
Neodymium(III) Hydroxide Hydrate
Neodymium Iodide NdI2
Neodymium(III) Iodide NdI3
Neodymium Isopropoxide
Neodymium(III) Nitrate, Anhydrous
Neodymium(III) Nitrate Hexahydrate
Neodymium Nitrate Hydrate
Neodymium Nitrate Solution
Neodymium Nitride NdN
Neodymium Nitride NdN3
Neodymium Oxalate
Neodymium Oxalate, Anhydrous
Neodymium Oxalate Hydrate
Neodymium Silicide
Neodymium Sulfate
Neodymium Sulfate Hydrate
Neodymium(III) Sulfate Octahydrate
Neodymium Sulfate Solution
Neodymium Perchlorate Solution
Neodymium(III) Phosphate Hydrate
Neodymium(III) Titanate

Organometallic Compounds

Neodymium 2-Ethylhexanoate
Neodymium Acetylacetonate
Neodymium Trifluoromethanesulfonate
Neodymium(III) Hexafluoro-2,4 - pentanedionate
Neodymium(III) Tris(2,2,6,6-tetramethyl-3,5-heptanedionate)


Neodymium-145 Oxide Isotope
Neodymium-150 Oxide Isotope

Recent Research & Development for Neodymium

  • Tao Wei, Ying Tian, Cong Tian, Xufeng Jing, Muzhi Cai, Junjie Zhang, Long Zhang, Shiqing Xu, Comprehensive evaluation of the structural, absorption, energy transfer, luminescent properties and near-infrared applications of the neodymium doped germanate glass, Journal of Alloys and Compounds, Volume 618, 5 January 2015
  • E. Gasnier, I. Bardez-Giboire, V. Montouillout, N. Pellerin, M. Allix, N. Massoni, S. Ory, M. Cabie, S. Poissonnet, D. Massiot, Homogeneity of peraluminous SiO2–B2O3–Al2O3–Na2O–CaO–Nd2O3 glasses: Effect of neodymium content, Journal of Non-Crystalline Solids, Volume 405, 1 December 2014
  • Shanjun Ke, Yanmin Wang, Zhidong Pan, Effect of lithium chloride on crystallization process of neodymium disilicate, Ceramics International, Volume 40, Issue 9, Part A, November 2014
  • H. Zaari, M. Boujnah, A.G. El hachimi, A. Benyoussef, A. El Kenz, Electronic structure and X-ray magnetic circular dichroic of Neodymium doped ZnTe using the GGA + U approximation, Computational Materials Science, Volume 93, October 2014
  • Elmar Willbold, Xuenan Gu, Devon Albert, Katharina Kalla, Katharina Bobe, Maria Brauneis, Carla Janning, Jens Nellesen, Wolfgang Czayka, Wolfgang Tillmann, Yufeng Zheng, Frank Witte, Effect of the addition of low rare earth elements (lanthanum, neodymium, cerium) on the biodegradation and biocompatibility of magnesium, Acta Biomaterialia, Available online 30 September 2014
  • Barbara Skołyszewska-Kühberger, Thomas L. Reichmann, Herbert Ipser, Phase equilibria in the neodymium–cadmium binary system, Journal of Alloys and Compounds, Volume 606, 5 September 2014
  • Xiongwei LI, Mei LI, Mitang WANG, Zhaogang LIU, Yanhong HU, Junhu TIAN, Effects of neodymium and gadolinium on weathering resistance of ZnO-B2O3-SiO2 glass, Journal of Rare Earths, Volume 32, Issue 9, September 2014
  • Allison M. Latshaw, Mark D. Smith, Hans-Conrad zur Loye, Crystal growth and structure of three new neodymium containing silicates: Na0.50Nd4.50(SiO4)3O, Na0.63Nd4.37(SiO4)3O0.74F0.26 and Na4.74Nd4.26(O0.52F0.48)[SiO4]4, Solid State Sciences, Volume 35, September 2014
  • Guicheng Jiang, Xiantao Wei, Shaoshuai Zhou, Yonghu Chen, Changkui Duan, Min Yin, Neodymium doped lanthanum oxysulfide as optical temperature sensors, Journal of Luminescence, Volume 152, August 2014
  • Elisha A. Josepha, Sara Farooq, Cinnamon M. Mitchell, John B. Wiley, Synthesis and thermal stability studies of a series of metastable Dion–Jacobson double-layered neodymium-niobate perovskites, Journal of Solid State Chemistry, Volume 216, August 2014

Neodymium Isotopes

Neodymium has five stable isotopes: 142Nd, 143Nd, 145Nd, 146Nd and 148Nd.

Nuclide Symbol Isotopic Mass Half-Life Nuclear Spin
142Nd 141.9077233 Stable 0+
143Nd 142.9098143 Observationally Stable 7/2-
145Nd 144.9125736 Observationally Stable 7/2-
146Nd 145.9131169 Observationally Stable 0+
148Nd 147.916893 Observationally Stable 0+