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What is Yttrium

Denoted by the chemical symbol Y, yttrium (pronounced as IT-ree-em) belongs to the family of transition and lanthanide metals. It is considered to be one of the rare earth elements having 50 isotopes, with yttrium-89 being the only stable one [3, 9].

Yttrium Symbol

Where is Yttrium Found in Nature

It is found associated with other rare earth mineral ores like monazite and bastnaesite, in Canada, Brazil, Australia, Hungary, and Greece. The mineral ore of xenotime is another good source as it can constitute up to 50% of yttrium phosphate [1].



The element is named after a village in Ytterby, Sweden.

Who Discovered It

Finnish chemist and physicist Johan Gadolin discovered it in 1794.

When and Where was it Discovered

In 1787, the Swedish chemist, Karl Arrhenius sent an unusual black rock, found near a quarry at Ytterby in the Stockholm region, to Gadolin in Finland for detailed analysis. He assumed it to be some new tungsten mineral. In 1794, while testing the rock, Gadolin discovered the presence of a new oxide compound (later found to be yttrium oxide) that constituted 38% of its weight and named it ‘earth’ as it would not undergo further reduction after heating with charcoal [1].

In 1828, Friedrich Wohler isolated yttrium by reacting yttrium chloride with potassium. However, it contained other elements as well [1].

When Carl Mosander, in 1843, examined yttrium oxide thoroughly, he found two more oxides, namely of terbium and erbium, having a yellow and rose-red appearance respectively [1].

Yttrium Element

Classification and Position of the Element on the Periodic Table [1]

Group 3
Period 5
Block d

Location of Yttrium in the Periodic Table

Properties of Yttrium [1, 2, 3]

General Properties

Relative Atomic Mass 88.906

Physical Properties

Color Silver white
Luster Metallic silver
Odor Unknown
Malleability Yes
Ductility Yes
Melting Point/Freezing Point  1522°C, 2772°F
Boiling Point 3345°C, 6053°F
Density 4.47 g/cm3
State of Matter at Room Temperature (Normal Phase) Solid
Work Function 8.31 eV

Chemical Properties

Flammability Yes
Oxidation state/Oxidation number (+1), (+2), +3
Maximum Oxidation Number 3

Atomic Data of Yttrium [1, 2, 3]

Atomic Number 39
Valence Electrons 4d 5s
Quantum Numbers
– n 4
– ℓ 2
– m -2
– m s +1/2
Ground State Electron Configuration [Kr] 4d1 5s2
Primary XPS Region Y3d
Crystal Structure hcp: hexagonal close-packed
Atomic Structure
– Number of Electrons 39
-Number of Neutrons 50
– Number of Protons 39
Radius of Atom
Atomic Radius 2.32 Å
– Covalent Radius 1.76 Å
Electronegativity 1.22
Ionic Charge +3
Ionization Energy


1st 2nd 3rd 4th 5th 6th 7th
599.878 1179.437 1979.88 5846.72 7429 8973 11192

Yttrium Bohr Model

What is Yttrium Used for

  • It is used to increase the strength of magnesium and aluminum alloys [3].
  • Yttrium functions as an efficient catalyst in the polymerization of ethane [1].
  • As a result of its high affinity for oxygen, the element is used as a deoxidizer in non-ferrous metals like vanadium [3].
  • Yttrium is used in lithium iron phosphate batteries for increasing their capacity and durability [7].
  • Yttrium-90, a radioisotope of Y, can be useful for radiation therapy for cancer treatment [1, 5], as well as in knee surgeries for treatment of osteoarthritis [8].
  • Yttrium oxide is used in camera lenses, and various communication devices like radar and satellite [1, 3].
  • Combining europium with yttrium oxide, yttrium orthovanadate, or yttrium oxysulfide produces red phosphorus, used in color television tubes [2, 3].
  • Yttrium-aluminum-garnet (YAG) is used as a simulated diamond in jewelry-making [2]. Neodymium-doped YAG laser may also have several applications in the medical and scientific fields like in Lasik surgery and laser spectroscopy [6].

Yttrium Aluminum Garnet

Yttrium Toxicity and Health Hazards

While water-soluble compounds of yttrium exhibit mild toxicity, its insoluble compounds are believed to be harmless [3]. Exposure to yttrium compounds can have mild toxic effects and can cause symptoms like shortness of breath, chest pain, and coughing [10]. In case of extreme exposure, it might even lead to lung diseases. Animal studies show yttrium and its compounds to cause liver and lung damage [3].

Yttrium Color

Interesting Facts

  • Analysis of rock and dust samples collected from the moon during the Apollo 11 mission has shown a high content of yttrium, ranging between 54 and 213 parts per million [3].
  • The stability of Y is attributed to the formation of an oxide coating on its surface upon exposure to the oxygen in air [3].

Yttrium Pictures

Yttrium Cost

The price of pure yttrium ranges between $400 and $450 per 100 grams.



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