Dipraseodimheptadecacinc is a binary inorganic compound, praseodymium and zinc intermetallic with the formula Pr 2 Zn 17 , crystals.
| Dipraseodymiumheptadecacinc | |
|---|---|
| Are common | |
| Systematic name | Dipraseodymiumheptadecacinc |
| Traditional names | Heptadecac Dipraseodymium |
| Chem. formula | Pr 2 Zn 17 |
| Rat formula | Zn 17 Pr 2 |
| Physical properties | |
| condition | crystals |
| Molar mass | 1393.45 g / mol |
| Density | 7.3 g / cm³ |
| Thermal properties | |
| T. melt. | 978 ° C |
| Enthalpy of Education | -32 [1] kJ / mol |
| Classification | |
| Reg. CAS number | 12066-87-4 |
Getting
- Fusion of stoichiometric amounts of pure substances:
Physical Properties
Dipraseodimheptadecacinc forms trigonal crystal crystals, space group R 3 m , cell parameters a = 0.9064 nm, c = 0.8845 nm, Z = 2, structure of the type of donorium heptadecanelic Ni 17 Th 2 .
At a temperature of 775 ° C, the compound undergoes a phase transition to hexagonal syngony , space group P 6 3 / mmc , cell parameters a = 0.90711 nm, c = 1.32592 nm, Z = 3, heptadecac- ditorium type structure Th 2 Zn 17 [ 2] [3] [4] [5] .
The compound melts congruently at a temperature of 978 ° C [2] .
Notes
- ↑ CP Wang, X. Chen, XJ Liu, Fu-Sheng Pan, K. Ishida. Thermodynamic modeling of the Ce-Zn and Pr-Zn systems // Journal of Alloys and Compounds. - 2008. - T. 458 , No. 1-2 . - S. 166-173 . - DOI : 10.1016 / j.jallcom.2007.03.03.120 .
- ↑ 1 2 State Diagrams of Double Metal Systems / Ed. N.P. Lyakisheva. - M .: Engineering, 2000. - T. 3 Book 2. - 448 p. - ISBN 5-217-02932-3 .
- ↑ B. Predel. Pr-Zn (Praseodymium-Zinc) // Landolt-Börnstein - Group IV Physical Chemistry. - 1998 .-- T. 5I . - S. 1-4 . - DOI : 10.1007 / 10542753_2514 .
- ↑ H. Okamoto. Pr-Zn (Praseodymium-Zinc) // Journal of Phase Equilibria and Diffusion. - 2011. - T. 32 , No. 1 . - S. 80-81 . - DOI : 10.1007 / s11669-010-9812-7 .
- ↑ JT Mason, P. Chiotti. Phase relations and crystallographic data for the Pr-Zn system // Metallurgical Transactions. - 1970. - T. 1 , No. 8 . - S. 2119-2123 . - DOI : 10.1007 / BF02643424 .