Praseodymium tetramedium is a binary inorganic compound of praseodymium and copper with the formula Cu 4 Pr, crystals.
| Praseodymium tetramed | |
|---|---|
| Are common | |
| Systematic name | Praseodymium tetramed |
| Traditional names | Tetramecodraseodymium |
| Chem. formula | PrCu 4 |
| Rat formula | Cu 4 Pr |
| Physical properties | |
| condition | crystals |
| Molar mass | 395.09 g / mol |
| Density | 7.7 g / cm³ |
| Thermal properties | |
| T. decomp. | 824 ° C [1] |
| Enthalpy of Education | -27.8 [2] kJ / mol |
Getting
- Fusion of stoichiometric amounts of pure substances:
Physical Properties
Praseodymium tetra gum forms rhombic syngony crystals, space group Pnnm , cell parameters a = 0.454 nm, b = 0.808 nm, c = 0.922 nm, Z = 4, tetromedium cerium type structure CeCu 4 [1] [3] [2] .
The compound is formed by a peritectic reaction at a temperature of 824 ° C [1] .
Notes
- ↑ 1 2 3 State Diagrams of Double Metal Systems / Ed. N.P. Lyakisheva. - M .: Metallurgy, 1997 .-- T. 2 .-- 1024 p. - ISBN 5-217-01569-1 .
- ↑ 1 2 PR Subramanian and DE Laughlin. The Cu-Pr (Copper-Praseodymium) System // Bulletin of Alloy Phase Diagrams. - 1988. - T. 9 , No. 3a . - S. 372-377 .
- ↑ B. Predel. Cu-Pr (Copper-Praseodymium) // Landolt-Börnstein - Group IV Physical Chemistry. - 1994 .-- T. 5d . - S. 1-3 . - DOI : 10.1007 / 10086090_1105 .