Synthesis and Crystallochemiсal Study of Spinels MgAl2-xCrxO4 Obtained by Co-Precipitation Method
Journal Title: Фізика і хімія твердого тіла - Year 2014, Vol 15, Issue 2
Abstract
The samples of solid solutions MgAl2-xCrxO4 (where x = 0…2 by step 0.2) were synthesized by co-precipitation method. Crystal parameters of spinel solid solutions were calculated: cell parameter a, anion parameter u, the deviation from the ideal structure δ, tetrahedral and octahedral distances α and β, the volume V and density of the unit cell, the angles between chemical bonds AOB and the BOB. It is shown that α does not change (0.1938 nm), β varies from 0.1903 – 0.1987 nm; unit cell parameter changes from 0.8057 to 0.8281 nm; anionic parameter that indicates the deviation from the ideal structure varies from 0.3889 to 0.3851; δ varies from 0.0139 to 0.0101, the volume of the unit cell changes from 0.5229 to 0.5678 nm3; X-ray density varies from 3606.74 to 4491.55 kg/m3; angle tetrahedral cation–Оxygen–octahedral cation increases ( AOB = 160.19…o – 161.53…o), and the angle of the octahedral cation–Оxygen–octahedral cation decreases ( BOB = 96.63…o – 94.82…o).
Authors and Affiliations
H. O. Sirenko, T. R. Tatarchuk, M. V. Myslin
Keywords
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