· CAS:7440-30-4
· Molecular Formula: Tm
· Purity: 99.99%
· EINECS No.:231-140-2
Package Class:Vacuum Bag or with argon protection sealed
High Purity Thulium Metal (Tm)
Characteristic
Thulium is a chemical element with the symbol Tm and atomic number 69. It is the thirteenth and third-last element in the lanthanide series. Thulium is relatively stable in air; thulium oxide is light green crystal. Silver-white metal, soft, with high vapor pressure at melting point.
Features： Lump
Melting point： 1818 K (1545 °C, 2813 °F)
Boiling point： 2223 K (1950 °C, 3542 °F)
Density (near r.t.)： 9.32 g/cm3
when liquid (at m.p.)： 8.56 g/cm3
Heat of fusion： 16.84 kJ/mol
Heat of vaporization： 191 kJ/mol
Molar heat capacity： 27.03 J/(mol·K)
Chemical Composition
Rare Earth Impurity(≤) | Tm/RE | ≥99.99% |
Item | La/RE | Ce/RE | Pr/RE | Nd/RE | Sm/RE | Eu/RE | Gd/RE |
Content(μm/g) | 2.10 | 1.20 | 3.90 | 2.80 | 3.20 | 2.10 | 2.30 |
Item | Tb/RE | Dy/RE | Ho/RE | Er/RE | Yb/RE | Lu/RE | Y/RE |
Content(μm/g) | 3.70 | 4.90 | 9.70 | 15.60 | 18.70 | 10.10 | 9.40 |
Non-Rare Earth Impurity(≤) | RE | ≥99.5% |
Item | Al | Fe | Ca | Si | Cu | Mo |
|
Content(μm/g) | 80.00 | 13.00 | 28.00 | 15.00 | 18.00 | 30.00 |
|
Application
Thulium is mainly used in the production of additives for neodymium iron boron alloys, giant magnetostrictive materials,magneto optical storage materials and nonferrous metal alloy casting.Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices, and in some solid-state lasers. It has no significant biological role and is not particularly toxic.
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