Neodymium

Neodymium is the secret ingredient in the most powerful permanent magnets ever made, neodymium-iron-boron (NdFeB) magnets are so strong they can crush a finger if brought together unexpectedly. They power the motors in every electric vehicle, the generators in wind turbines, and the miniaturised speakers in earbuds and phones.

  • Atomic Number6060 protons, 60 electrons
  • Atomic Mass144.24 u60× heavier than hydrogen
  • State at Room TempSolidSolid
  • Density7.01 g/cm³
  • Melting / Boiling1020.9°C / 3073.8°C
  • Discovered1885

What is Neodymium?

Neodymium is a silvery rare earth metal with 60 protons. Its most common oxidation state is +3. In compounds, it produces a distinctive purple or lilac colour. Its extraordinary value lies in its magnetic properties when alloyed with iron and boron.

Named from the Greek neos didymos meaning new twin, separated from praseodymium ("green twin") by Carl Auer von Welsbach in 1885. Both elements had been hiding in the mixture "didymium" which was wrongly thought to be a single element.

Fact A single Tesla Model 3 electric motor contains approx. 1.5 kg of neodymium. With millions of electric vehicles expected to be sold each year through the 2030s, securing neodymium supply has become a critical industrial and geopolitical priority. China's dominance of rare earth production gives it significant leverage.

Where you find Neodymium

On Earth

China produces over 80% of the world's neodymium. Also found in Australia, the USA and Russia.

How we use Neodymium

  • NdFeB permanent magnets are the strongest permanent magnets known. A kilogram of neodymium magnet can exert a force equivalent to several tonnes. Used in every EV motor and wind turbine generator.. Electric vehicle motors & wind turbines
  • Neodymium doped into YAG (yttrium aluminium garnet) creates the Nd:YAG laser used in surgery, material processing and laser rangefinders.. Lasers
  • Neodymium oxide gives glass a delicate violet or purple tint and is used in colouring glass and enamels.. Glassmaking

How it was discovered

Named from the Greek neos didymos meaning new twin, separated from praseodymium ("green twin") by Carl Auer von Welsbach in 1885. Both elements had been hiding in the mixture "didymium" which was wrongly thought to be a single element.

Deeper dive: neodymium and the lanthanide series

The lanthanides (elements 57-71) are characterised by the progressive filling of the 4f electron subshell. Because the 4f electrons are deep inside the atom and shielded by outer electrons, they have little effect on chemical bonding. All lanthanides have very similar chemical behaviour, forming +3 ions of comparable size. This similarity makes them extraordinarily difficult to separate from each other, historically requiring hundreds of fractional crystallisation steps. Ion exchange chromatography and solvent extraction methods, developed in the 1940s, finally made pure lanthanides available in quantity.

The term "rare earth" is historically misleading. Most lanthanides are as abundant as copper or nickel in the Earth's crust. The challenge is not scarcity but concentration: they are geochemically dispersed and rarely form rich mineral deposits. The name stuck from the 18th century when they were genuinely difficult to isolate.

Moving to 61 protons brings us to the next element in this remarkable family.