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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Prots, Yurii
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Publications (5/5 displayed)
- 2023Eu4Al13Pt9 – a coloring variant of the Ho4Ir13Ge9 type structurecitations
- 2022FeWO 4 Single Crystals: Structure, Oxidation States, and Magnetic and Transport Propertiescitations
- 2021Tricyanidoferrates(−IV) and Ruthenates(−IV) with Non-Innocent Cyanido Ligandscitations
- 2013Cs7Nd11(SeO3)(12)Cl-16: first noncentrosymmetric structure among alkaline-metal lanthanide selenite halidescitations
- 2005Crystal structure, chemical bonding, and phase relations of the novel compound Co4Al7+xSi2-x (0.27 = x = 1.05)
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article
Crystal structure, chemical bonding, and phase relations of the novel compound Co4Al7+xSi2-x (0.27 = x = 1.05)
Abstract
The title compound was detected and characterized during a systematic study of the Al-rich part of the Co-Al-Si system. The crystal structure was established via single-crystal X-ray diffraction. It represents a new type of structure of intermetallic compounds (Pearson symbol mC26, space group C2/m). The homogeneity range of the phase Co4Al7+xSi 2-x (0.27(3) = x = 1.05(2)) and equilibria with neighboring phases were studied by electron probe microanalysis (EPMA) and X-ray powder diffraction. The lattice parameters of the compound were found to vary between Al-poor and Al-rich composition (a = 11.949(1)-12.042(1) A°, b = 3.9986(4)-4.0186(4) A°, c = 7.6596(8)-7.6637(9) A°, and ß= 106.581(7)-106.140(7)°). A partial disorder caused by the Al/Si substitution in one of the five main group element positions was found, and different ordering models yielding different Al/Si occupation motifs and different distributions of interatomic distances are discussed in detail. Chemical bonding analysis with the electron localization function (ELF) reveals a covalently bonded Al/Si network and rather ionic interactions between Co and the network. Œ 2005 American Chemical Society.