Crystal structure of acicular γ-Fe2O3 particles used in recording media

γ-Fe2O3 particles have been examined by convergent beam electron diffraction to determine the crystal symmetry. The particles have a primitive lattice with an m3m point group and a cubic superstructure with lattice parameter approximately equal to three times the lattice parameter of the magnetite s...

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Veröffentlicht in:	Journal of applied physics 1986-03, Vol.59 (5), p.1606-1610
Hauptverfasser:	HUEI-MIN HO, GOO, E, THOMAS, G
Format:	Artikel
Sprache:	eng
Schlagworte:	Condensed matter: structure, mechanical and thermal properties Exact sciences and technology Inorganic compounds Physics Structure of solids and liquids crystallography Structure of specific crystalline solids Water, oxides, hydroxides, peroxides
Online-Zugang:	Volltext
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Zusammenfassung:	γ-Fe2O3 particles have been examined by convergent beam electron diffraction to determine the crystal symmetry. The particles have a primitive lattice with an m3m point group and a cubic superstructure with lattice parameter approximately equal to three times the lattice parameter of the magnetite structure. This superlattice is a result of cation vacancy ordering. During observation, disordering in the electron microscope occurs and is believed to be caused by electron radiation-enhanced diffusion.
ISSN:	0021-8979 1089-7550
DOI:	10.1063/1.336471