In spinels accurate determination of cell edge a is crucial , if X-ray powder diffraction methods are used to derive the variations in cation distributions due to thermal treatment. The reproducibility of this parameter was tested by carrying out several a measurements on two spinel samples (VASA and CR5A) the first a near spinel end member and the second a chromium-rich sample, both untreated and quenched from high temperatures. Further Mossbauer spectra were performed on the same powders with the aim of understanding the intracrystalline distributions responsible for the detected variations in a.
Intracrystalline disorder in spinels: sensitivity of cell parameter a and Mossbauer data.
SALVIULO, GABRIELLA;RUSSO, UMBERTO;DELLA GIUSTA, ANTONIO;CARBONIN, SUSANNA
1999
Abstract
In spinels accurate determination of cell edge a is crucial , if X-ray powder diffraction methods are used to derive the variations in cation distributions due to thermal treatment. The reproducibility of this parameter was tested by carrying out several a measurements on two spinel samples (VASA and CR5A) the first a near spinel end member and the second a chromium-rich sample, both untreated and quenched from high temperatures. Further Mossbauer spectra were performed on the same powders with the aim of understanding the intracrystalline distributions responsible for the detected variations in a.
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