Global Elements Solutions

Thulium Metal (Tm Metal)

Categories Rare earth, Thulium

Thulium Metal (Tm Metal)

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Additional information

Item Number	ME69
Product Name	Thulium (Tm) Metal
CAS Number	7440-30-4
M. F.	Tm
Purity	99%; 99.9%; 99.99% (REM)
Appearance	Silvery lump pieces, ingots, rod, foil, wire, etc.

Description:

Thulium is a silvery-gray, soft, and malleable rare earth metal in the lanthanide series (atomic number 69). It is one of the least abundant rare earth elements but has unique properties, including luminescence and X-ray emission.

Symbol: Tm
Atomic Number: 69
Atomic Weight: 168.93422
Melting Point: 1,545°C (2,813°F)
Boiling Point: 1,950°C (3,542°F)
Density: 9.32 g/cm³

Applications:

Medical & Radiation Technologies

Portable X-ray Machines: Tm-170 (radioactive isotope) is used in compact, battery-powered X-ray devices for field medicine and dentistry.
Cancer Treatment: Investigated for targeted alpha therapy due to its decay properties.

Lasers & Fiber Optics

Thulium-Doped Fiber Lasers (TDFLs): Emit in the 1.9–2.1 μm infrared range, used in:
- Laser surgery (precise tissue cutting with minimal bleeding).
- Military countermeasures (IR decoys).
- Material processing (welding, engraving).

Phosphors & Lighting

Blue LED Phosphors: Tm³-doped materials help produce blue light in LEDs and display screens.
UV-Emitting Lamps: Used in forensic and counterfeit detection.

4. Nuclear Applications

Neutron Absorption: Used in control rods for nuclear reactors (though less common than europium/gadolinium).

5. Superconductors & Electronics

High-Temperature Superconductors: Thulium is studied in yttrium-based superconductors (YBCO) for improved performance.
Semiconductor Dopant: Enhances properties of thin-film transistors.

6. Scientific Research

Mössbauer Spectroscopy: Tm-169 is used to study magnetic and structural properties of materials.

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