| 1. | Praseodymium makes up 1 part per trillion of seawater.
|
| 2. | There is almost no praseodymium in the atmosphere.
|
| 3. | However they were unable to make the cerium, praseodymium, and terbium nickelates.
|
| 4. | Mischmetal, used in making cigarette lighters, historically contained about 5 % praseodymium metal.
|
| 5. | Like most rare earth elements, praseodymium most readily forms trivalent Pr ( III ) ions.
|
| 6. | Many of praseodymium's industrial uses involve its use to filter yellow light from light sources.
|
| 7. | It is the most common of the lanthanides, followed by neodymium, lanthanum, and praseodymium.
|
| 8. | By contrast, at sufficiently high loadings, praseodymium glass is distinctly green, rather than pure yellow.
|
| 9. | However, this model fails to address superconductivity in the homologue Pr123 ( praseodymium instead of yttrium ).
|
| 10. | Praseodymium occurs in small quantities in Earth's crust ( 9.5 counter-current solvent extraction.
|
मोबाइल