2006
DOI: 10.1007/s10717-006-0126-5
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Synthesis of nonstoichiometric aluminomagnesium spinel with a tetragonal lattice (review)

Abstract: The results of x-ray diffraction and IR-spectroscopic studies of samples of nonstoichiometric aluminomagnesium spinel Mg 1 -x Al 2 -y O 4 -z (OH) z formed after treating aluminomagnesium spinel synthesized by the sol-gel method at temperatures of 800 and 1100°C with concentrated acids, are reported. It was found that three phases of nonstoichiometric aluminomagnesium spinel Mg 1 -x Al 2 -y O 4 -z (OH) z with tetragonal lattices and a different type of superstructure are formed. The x-ray patterns of the two ph… Show more

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Cited by 6 publications
(9 citation statements)
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“…The lattice parameters for the nonstoichiometric spinels for x ≤ 0.50 formed by selectively reducing the nickel from Ni x Mg 1− x Al 2 O 4 are plotted in Figure . These lattice parameters are compared with values reported in the literature for nonstoichiometric spinels synthesized through the solid-state reaction of oxides, demonstrating good agreement with previous work. ,, …”
Section: Resultssupporting
confidence: 82%
See 1 more Smart Citation
“…The lattice parameters for the nonstoichiometric spinels for x ≤ 0.50 formed by selectively reducing the nickel from Ni x Mg 1− x Al 2 O 4 are plotted in Figure . These lattice parameters are compared with values reported in the literature for nonstoichiometric spinels synthesized through the solid-state reaction of oxides, demonstrating good agreement with previous work. ,, …”
Section: Resultssupporting
confidence: 82%
“…These lattice parameters are compared with values reported in the literature for nonstoichiometric spinels synthesized through the solid-state reaction of oxides, demonstrating good agreement with previous work. 11,13,23 Both the change in the site occupancies (V Ni ′′ and V O •• ) and the change in the spinel lattice parameter will result in a measurable change in mass density. Densities of the defect spinels are estimated using the pycnometer density for the Ni + spinel mixtures and the Rietveld-derived weight fraction of each phase.…”
Section: Resultsmentioning
confidence: 99%
“…This would not be very surprising because the structures of c-alumina or b-alumina are spinel like (Tsvigunov et al, 2006). As shown in previous XANES studies of these polymorphs (Doyle et al, 1999;Marcelli et al, 2000), there is a region where peak a, b, c and d are merged (similar to the Al rich sample in Fig.…”
Section: Liquid Aluminasupporting
confidence: 69%
“…In Hercynite belongs to a class of compounds with spinel structure, which is described by the Fedorov symmetry group [12]. The mineral ceylonite is a spinel with intermediate composition between the precious spinel and hercynite.…”
mentioning
confidence: 99%
“…Hercynite at temperatures above 875°C forms a solid solutions with magnetite [14 -20] and, just like MgAl 2 O 4 [12], with aluminum oxide (Fig. 1) [14].…”
mentioning
confidence: 99%