Crystal structure of acicular γ-Fe2O3 particles used in recording media
- 1 March 1986
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 59 (5), 1606-1610
- https://doi.org/10.1063/1.336471
Abstract
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.Keywords
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