| Autor: |
Engel, Stefan, Zaremba, Nazar, Prots, Yurii, Touzani, Rachid S., Janka, Oliver |
| Předmět: |
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| Zdroj: |
Zeitschrift für Naturforschung B: A Journal of Chemical Sciences; Mar2023, Vol. 78 Issue 3/4, p147-156, 10p |
| Abstrakt: |
Investigations in the ternary system Eu–Al–Pt led to the discovery of Eu4Al13Pt9, a new representative exhibiting a coloring variant of the Ho4Ir13Ge9 type structure. The orthorhombic structure was refined based on single crystal X-ray diffraction data (Pmmn, Wyckoff sequence e9b3a5, a = 415.38(1), b = 1149.73(2), c = 1994.73(5) pm, wR2 = 0.0622, 1901 F2 values, 88 variables) and full atomic ordering was observed for all atoms. The structure features a complex [Al13Pt9]δ– network with the Eu atoms occupying hexagonal prismatic cavities. The bonding situation of this new platinide was investigated via quantum-chemical calculations. According to Density Functional Theory (DFT) the title compound has to be described as a polar intermetallic material with a covalently bonded [Al13Pt9]δ– polyanion showing strong Pt–Al alongside weak Al–Al and Pt–Pt bonding and Eu cations in the cavities. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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