Praseodymium diisoloto - binary inorganic compound, praseodymium and gold with the formula Au 2 Pr, crystals.
| Prazeodimdizoloto | |
|---|---|
| General | |
| Systematic name | Prazeodimdizoloto |
| Traditional names | Dizolotropraseodymium |
| Chem. formula | Au 2 Pr |
| Rat formula | PrAu 2 |
| Physical properties | |
| condition | crystals |
| Molar mass | 534.84 g / mol |
| Density | 12.6 g / cm³ |
| Thermal properties | |
| T. melt. | 1210 ° C [1] |
| T. decomp. | 1090 ° C [2] |
| Enthalpy of Education | -64 [3] kJ / mol |
| Classification | |
| Reg. CAS number | 11092-56-1 |
Getting
- Fusion of stoichiometric amounts of pure substances:
Physical Properties
Praseodymiumdisoloto forms rhombic syngony crystals, space group I mma , cell parameters a = 0.4872 nm, b = 0.7040 nm, c = 0.8178 nm, Z = 4, structure of the type dimetzerium Cu 2 Ce [1] [4] [5] .
There is data on the high-temperature phase of tetragonal syngony , space group P 4 / nmm , cell parameters a = 1.60 nm, c = 0.936 nm, Z = 32, and a structure of the type neodymium disolite Au 2 Nd [1] .
The compound melts congruently at a temperature of 1210 ° C [1] .
In [2], it was reported that the compound is formed by a peritectic reaction at a temperature of 1090 ° C, and the high-temperature phase corresponds to the Au 36 Pr 17 compound, which exists in the temperature range 1000–1180 ° C.
Notes
- ↑ 1 2 3 4 State Diagrams of Double Metal Systems / Ed. N.P. Lyakisheva. - M .: Mechanical Engineering, 1996. - T. 1. - 992 p. - ISBN 5-217-02688-X .
- ↑ 1 2 H. Okamoto. Au-Pr (Gold-Praseodymium) // Journal of Phase Equilibria and Diffusion. - 2007. - T. 28 , No. 5 . - S. 489 . - DOI : 10.1007 / s11669-007-9129-3 .
- ↑ B. Predel. Au-Pr (Gold-Praseodymium) // Landolt-Börnstein - Group IV Physical Chemistry. - 1991 .-- T. 5a . - S. 1-2 . - DOI : 10.1007 / 10000866_307 .
- ↑ A. Saccone, D. Macciò, M. Giovannini, S. Delfino. The praseodymium-gold system // Journal of Alloys and Compounds. - 1997. - T. 247 , No. 1–2 . - S. 134-140 . - DOI : 10.1016 / S0925-8388 (96) 02606-0 .
- ↑ Zhenmin Du, Cuiping Guo, Dongxian Lü. Thermodynamic assessment of the Au – Pr system // Journal of Alloys and Compounds. - 2004. - T. 364 , No. 1–2 . - S. 117-120 . - DOI : 10.1016 / S0925-8388 (03) 00525-5 .