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Local Atomic Arrangements in a Magnesiowustite Solid Solution
Author(s) -
KRAWITZ A.,
COHEN J. B.
Publication year - 1975
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1975.tb11436.x
Subject(s) - spinel , scattering , ion , magnetization , range (aeronautics) , solid solution , chemistry , short range order , precipitation , condensed matter physics , analytical chemistry (journal) , materials science , magnetic field , physics , crystallography , optics , metallurgy , organic chemistry , chromatography , quantum mechanics , meteorology , composite material
Quantitative studies of diffuse X‐ray scattering and measurements of magnetization are reported for (Fe,Mg)O with 15.7 cation % Fe held in a reducing atmosphere at 1400°C and quenched. The diffuse scattering is greater for fast cooling than for slow cooling; in both cases, spinel precipitation occurs, but the amount is much larger in the latter case. From this scattering, short‐range order parameters were determined for the clustering between cations, and displacements were obtained between cations and anions. From the magnetic measurements the size of magnetic Fe ion clusters was obtained. Computer simulations of the cation arrangement with the measured short‐range order parameters indicate that the magnetic clusters cannot be accounted for by nearest‐neighbor Fe 2+] clusters. However, clusters of Fe ions related by first‐ and/or second‐neighbor vectors are of the size found from the magnetic data.