NEW GADOLINIUM OXOTELLURITES: SYNTHESIS AND CHARACTERISTICS
Rustembekov K.T. Toibek A.A. Kasenov B.K. Stoev M.
2024Belaruskaya Navuka
Proceedings of the National Academy of Sciences of Belarus, Chemical Series
2024#60Issue 4281 - 289 pp.
Gadolinium oxotellurites GdMeTeO4.5 (Me – Mg, Ca) were synthesized using ceramic technology with solid-phase interaction of oxides Gd2 O3 and TeO2 with carbonates MgCO3 and CaCO3. X-ray characteristics were obtained using an Empyrean powder diffractometer and specialized programs Data Collector version 7.7h and X’Pert HighScore Plus using the Crystallography Open Database and PDF-2. Based on X-ray studies, it was established that the synthesized tellurites crystallize in a tetragonal syngony. The reliability and correctness of the indexing results is confirmed by the satisfactory agreement between the experimental and calculated parameters of the crystal lattice, unit cell volumes, X-ray and pycnometric densities. A study of the temperature dependence of the electrical resistance of gadolinium-magnesium tellurite has established that the compound may have semiconductor properties, with a band gap ∆E = 2.64 ± 0.13 ∙ 10–2 eV. The results can be used for the synthesis and study of new derivatives of tellurium and rare earth elements and are of interest for electronic technology. X-ray characteristics of new tellurites of s-, f-elements are the starting materials for inclusion in fundamental data banks and reference books.
electrical resistance , gadolinium , indexing , radiography , synthesis , tellurites
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Academician of Kazakhstan National Academy of Natural Sciences. Karaganda Buketov University, 28, Uni-versitetskaya Str., Karaganda, 100024, Kazakhstan
Karaganda Buketov University, 28, Universitetskaya Str, Karaganda, 100024, Kazakhstan
Academician of Kazakhstan National Academy of Natural Sciences. Zh. Abishev Chemical Metallurgical Institute, 63, Ermekov Str., Karagandy, 100050, Kazakhstan
South-West University ˮNeofit Rilskiˮ, 66, Ivan Mikhailov Str., Blagoe-vgrad, Bulgaria
Academician of Kazakhstan National Academy of Natural Sciences. Karaganda Buketov University
Karaganda Buketov University
Academician of Kazakhstan National Academy of Natural Sciences. Zh. Abishev Chemical Metallurgical Institute
South-West University ˮNeofit Rilskiˮ
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