Terbium Fluoride
Introduction
Formula: TbF3
CAS No.: 13708-63-9
Molecular Weight: 215.92
Density: 7.23 g/cm3
Melting point: 1172 °C
Appearance: White crystalline
Solubility: Insoluble in water, moderately soluble in strong mineral acids
Stability: Slightly hygroscopic
Multilingual: TerbiumFluorid, Fluorure De Terbium, Fluoruro Del Terbio
Terbium Fluoride is used in special lasers and as a dopant in solid-state devices, and has important role as an activator for green phosphors used in colour TV tubes. Terbium is used as a dopant in Calcium Fluoride, Calcium Tungstate and Strontium Molybdate, Terbium 'green' phosphors (which fluoresce a brilliant lemon-yellow) are combined with divalent Europium blue phosphors and trivalent Europium red phosphors to provide the 'trichromatic' lighting technology which is by far the largest consumer of the world's Terbium supply. Trichromatic lighting provides much higher light output for a given amount of electrical energy than does incandescent lighting. It is also used in alloys and in the production of electronic devices.
Certificate of Analysis
| Product Code | 6541 | 6543 | 6545 | 6547 |
| Grade | 99.999% | 99.99% | 99.9% | 99% |
| CHEMICAL COMPOSITION | ||||
| Tb4O7 /TREO (% min.) | 99.999 | 99.99 | 99.9 | 99 |
| TREO (% min.) | 81 | 81 | 81 | 81 |
| Rare Earth Impurities | ppm max. | ppm max. | % max. | % max. |
| Eu2O3/TREO Gd2O3/TREO Dy2O3/TREO Ho2O3/TREO Er2O3/TREO Tm2O3/TREO Yb2O3/TREO Lu2O3/TREO Y2O3/TREO | 1 5 5 1 1 1 1 1 3 | 10 20 20 10 10 10 10 10 10 | 0.01 0.1 0.2 0.02 0.01 | 0.01 0.5 0.3 0.05 0.03 |
| Non-Rare Earth Impurities | ppm max. | ppm max. | % max. | % max. |
| Fe2O3 SiO2 CaO Cl- CuO NiO ZnO PbO | 2 30 10 1 1 1 1 1 | 5 50 50 3 3 3 3 3 | 0.001 0.01 0.01 0.03 | 0.005 0.03 0.03 0.03 |