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X‐ray diffraction measurements of the cation distributions in spinel structures
Author(s) -
Fagherazzi G.,
Garbassi F.
Publication year - 1972
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/s0021889872008660
Subject(s) - spinel , diffraction , ferrite (magnet) , tetrahedron , crystallography , ion , sequence (biology) , chemistry , x ray crystallography , materials science , physics , optics , metallurgy , biochemistry , organic chemistry , composite material
X‐ray diffraction methods are applied to determine the cation distribution and the oxygen positional parameter in low‐substituted magnetites with Al 3+ , Ga 3+ , or In 3+ as substituents. It is possible to conclude that the tetrahedral site preference increases in the sequence Al 3+ , Fe 3 + , In≃Ga 3+ , in good agreement with magnetic properties of similar systems and with theoretical considerations of various authors. The presence of a part of the Al 3+ ions in tetrahedral sites is Confirmed by means of the Mössbauer effect. Reliability of the methods and errors are discussed. X‐ray methods such as these appear to be potentially applicable for industrial checks in ferrite production.