Crystal structure of the ternary compound γ-Al3FeSi
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Jérome Roger
Abstract
Ternary iron silicide aluminide γ-Al3FeSi crystals were grown from two Al—Fe—Si melts quenched in cold water. The crystal structures were determined from single-crystal X-ray data: trigonal symmetry, space group R-3 (n°148), unit cell parameters a = 10.2223(2) Å, c = 19.6791(4) Å (V = 1781 Å3) for the Si-poorer crystal and a = 10.1987(2) Å, c = 19.5320(3) Å (V = 1759 Å3) for the Si-richer one. The structure of γ-Al3FeSi may be described in terms of Al-cubes connected together by Al—Al pairs. The structure contains also Al cuboctaedra with one Fe—Al mixed atom in the center. The average chemical formula obtained from the refinements is Al3FeSi. This phase shows a partial disorder on the aluminium network because of the substitution of aluminum atoms by silicon. This substitution mechanism is at the origin of the large homogeneity range of this phase.
© by Oldenbourg Wissenschaftsverlag, Villeurbanne Cedex, Germany
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Articles in the same Issue
- Crystal structure of the ternary compound γ-Al3FeSi
- Ab initio study of the properties of CuAlSe2: A chalcopyrite compound
- Crystal structures of thiazine-indigo pigments, determined from single-crystal and powder diffraction data
- Structural characterization of arbidol®
- (2-Amidoethyl)trichlorotin(IV)complexes with amido ligands and chloride ion: supramolecular arrays from H-bonds involving the amido and chloride ions
- Crystal structures of hydrazones, 2-(1,3-benzothiazolyl)-NH—N=CH—Ar, prepared from arenealdehydes and 2-hydrazinyl-1,3-benzothiazole
- Synthesis, X-ray crystal structure and theoretical study of 4-ethyl-5-(2-thienyl)-2,4-dihydro-3H-1,2,4-triazole-3-thione; structural comparison with its aromatic analogs
