Anion-Substituted Garnets Ca3Mn2 – x(Ni, Co)xVyGe3 – yO12 (x = 0, 1; y = 0, 1, 2): Preparation and Characterization
- Authors: Khaliullin S.M.1, Lobachevskaya N.I.1, Kuznetsov M.V.1, Bamburov V.G.1
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Affiliations:
- Institute of Solid State Chemistry, Ural Branch
- Issue: Vol 63, No 10 (2018)
- Pages: 1268-1273
- Section: Synthesis and Properties of Inorganic Compounds
- URL: https://journal-vniispk.ru/0036-0236/article/view/169010
- DOI: https://doi.org/10.1134/S0036023618100091
- ID: 169010
Cite item
Abstract
Garnets with the structure similar to that of Ca3Mn2Ge3O12 have been prepared with simultaneous substitutions of Ge4+ by V5+ in tetrahedra and of Mn3+ by Ni2+ or Co2+ in octahedra. X-ray photoelectron spectroscopy (XPS) proved the absence of V4+ in tetrahedra of the lattice of the compounds prepared and determined the valences of elements in octahedral sites. The increasing d-cation size in octahedra is accompanied by an increase in unit cell volume regardless of the composition of tetrahedra (VyGe3 – y)O12. The electrical conductivity of Ca3Mn2 – x(Ni, Co)xVyGe3–yO12 (x = 0, 1; y = 0, 1, 2) garnet ceramic samples and the calculated bandgap widths make it possible to classify them with medium-gap semiconductors.
About the authors
Sh. M. Khaliullin
Institute of Solid State Chemistry, Ural Branch
Author for correspondence.
Email: khaliullin@ihim.uran.ru
Russian Federation, Yekaterinburg, 620990
N. I. Lobachevskaya
Institute of Solid State Chemistry, Ural Branch
Email: khaliullin@ihim.uran.ru
Russian Federation, Yekaterinburg, 620990
M. V. Kuznetsov
Institute of Solid State Chemistry, Ural Branch
Email: khaliullin@ihim.uran.ru
Russian Federation, Yekaterinburg, 620990
V. G. Bamburov
Institute of Solid State Chemistry, Ural Branch
Email: khaliullin@ihim.uran.ru
Russian Federation, Yekaterinburg, 620990
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