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Caractérisation du fer amorphe élaboré par décomposition à froid du fer carbonyle
Author(s) -
Lauriat J. P.
Publication year - 1976
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889876010819
Subject(s) - neon , amorphous solid , chemistry , decomposition , liquid nitrogen , analytical chemistry (journal) , nitrogen , crystallography , materials science , argon , organic chemistry
Very low‐concentration mixtures of gaseous Fe(CO) 5 and neon are decomposed in a glow discharge, leaving powdered amorphous iron. A charcoal trap cooled at liquid nitrogen temperature selectively adsorbs the CO from decomposition under a constant pressure of neon. The product, stable at room temperature, has been characterized as iron by X‐ray diffraction. The pair distribution function gives the distance ratios expected for an amorphous material (tetrahedral model) computed on the basis of dense random packing of hard spheres or molecular dynamics with a central potential. However, these models may be questioned in the case of a non‐compact body‐centred structure.