Solid Solution with Spinel Structure in the System MgO–NiO–Ga2O3

Samples of the initial composition Mg 1 –  x Ni x Ga 2 O 4 (0 ≤ х ≤ 1, step х = 0.1) synthesized by the gel combustion method and annealed at 1000°C have been studied by X-ray powder diffraction and IR spectroscopy. For homogeneous samples of (Mg,Ni)Ga 2 O 4 with a spinel structure, the gallium nons...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2022-07, Vol.67 (7), p.978-983
Main Authors: Smirnova, M. N., Kop’eva, M. A., Nipan, G. D., Nikiforova, G. E., Yapryntsev, A. D., Petrova, K. V., Korotkova, N. A.
Format: Article
Language:English
Subjects:
Absorption spectra
Chemistry
Chemistry and Materials Science
Gallium oxides
Homogeneity
Inductively coupled plasma
Infrared spectroscopy
Inorganic Chemistry
Magnesium oxide
Nickel oxides
Solid solutions
Spinel
Synthesis and Properties of Inorganic Compounds
X ray powder diffraction
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Summary:Samples of the initial composition Mg 1 –  x Ni x Ga 2 O 4 (0 ≤ х ≤ 1, step х = 0.1) synthesized by the gel combustion method and annealed at 1000°C have been studied by X-ray powder diffraction and IR spectroscopy. For homogeneous samples of (Mg,Ni)Ga 2 O 4 with a spinel structure, the gallium nonstoichiometry has been determined by inductively coupled plasma atomic emission spectrometry. Within the framework of the MgO–NiO–Ga 2 O 3 system, the boundary of the homogeneity region of spinel (Mg,Ni)Ga 2 O 4 , which is in equilibrium with halite (Mg,Ni)O, has been outlined. An analysis of the diffuse reflectance spectra of (Mg,Ni)Ga 2 O 4 in the range of 350–900 nm revealed intense absorption bands from Ni 2+ in octahedral positions and showed an increase in their intensity with an increase in the nickel content in the spinel.
ISSN:0036-0236
1531-8613
DOI:10.1134/S0036023622070221