FEAL3SI2

Authors
GUENEAU C SERVANT C DYVOIRE F RODIER N
Citation
C. Gueneau et al., FEAL3SI2, Acta crystallographica. Section C, Crystal structure communications, 51, 1995, pp. 177-179
Citations number
11
Categorie Soggetti
Crystallography
Journal title
Acta crystallographica. Section C, Crystal structure communications → ACNP
ISSN journal
01082701
Volume
51
Year of publication
1995
Part
2
Pages
177 - 179
Database
ISI
SICI code
0108-2701(1995)51:<177:F>2.0.ZU;2-O
Abstract
The title compound, iron trialuminium disilicide, is isotypic with PdG a5, but presents a superstructure. All the crystals investigated were found to be twinned by pseudosymmetry. The average structure was refin ed in the space group I4/mcm. Then the superstructure was solved in Pb cn. It can be described as a succession of layers parallel to (001), m ade up of distorted bicapped tetragonal prisms, Al(1)Fe2Al(2)4Si4, cen tered on Al(1). Each of these polyhedra is connected by sharing edges with four similar polyhedra of the same layer and by Fe-corner sharing with two polyhedra of the adjacent layers.