Abstract
Doubts concerning the conventionally assumed centrosymmetry of the cubic crystal structure of spinel ferrites, including magnetite, have existed for many years, chiefly because dielectric constants as high as 103-104 have been observed at low frequencies. The authors show that evidence neglected in a published X-ray diffraction study of magnetite favors a non-centrosymmetrical structure. They also report new measurements of X-ray diffraction intensity which reveal that, contrary to the behaviour expected of a centrosymmetrical structure. Friedel's law is violated by magnetite when anomalous scattering is present.
Original language | English |
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Pages (from-to) | L989-L992 |
Number of pages | 4 |
Journal | Journal of Physics C: Solid State Physics |
Volume | 21 |
Issue number | 29 |
DOIs | |
Publication status | Published - 1988 |