Novel Titanium-Manganites of Lanthanum and Alkali Metals

Лантан және сілтілі металдардың жаңа титан-манганиттері
Новые титано-манганиты лантана и щелочных металлов
Kasenov B.K. Kasenova S.B. Sagintaeva Z.I. Kuanyshbekov Y.Y. Turtubaeva M.O. Baisanov S.O. Lu N.Y. Isabaeva M.A.
2022 E.A.Buketov Karaganda State University Publish House

Bulletin of the Karaganda University Chemistry Series
2022 #108 Issue 4 136 - 141 pp.

The titanium-manganites of LaMe^I2TiMnO6 (Me^I — Li, Na, K) were synthesized by the ceramic technology with the high-temperature reaction of oxides of La₂O₃, TiO₂, Mn₂O₃ with carbonates of Li₂CO₃, Na₂CO₃, K₂CO₃ within 800–1200 ºС. The X-ray diffraction methods demonstrated that all of them were crystallized in the cubic syngony with the lattice parameters such as LaLi₂TiMnO₆— а = 13.48±0.02 Å, V^o = 2449.46±0.06 Å³, Z = 4, V^o_el.cell = 612.87±0.02 Å³_ρroent. = 3.81; _ρpick. = 3.78±0.03 g/cm³; LaNa₂TiMnO₆— а = 14.06±0.02 Å, V^o = 2779.43±0,06 Å³, Z = 4, V^o_el.cell= 694.96±0.02 Å³_ρroent. = 3.67; _ρpick. = 3.65±0.01 g/cm³; LaK2TiMnO6 — а = 14.74±0.02 Å, V^o = 3202.52±0.06 Å³, Z = 4, V^oel.cell = 800.52±0.02 Å³, ρroent. = 3.45; ρ pick. = 3.43±0.01 g/cm³. Correctness and authenticity of the results on the indexing of X-ray photographs of titanium-manganite were confirmed with the good experimental and calculated values (10⁴/d²), the pycnometric and X-ray densities, and also the theoretical and experimental values of cell volumes. The rising of values of the lattice parameters of the synthesized titanium-manganites was determined with increasing in the ionic radii from Li to K.

alkali metals , indexing , lanthanum , lattice parameters , syngony , synthesis , titanium-manganite , unit cell , X-ray diffraction

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Laboratory of the Thermochemical Processes, Zh. Abishev Chemical-Metallurgical Institute, Ermekov St., 63, Karaganda, 100009, Kazakhstan
Kazakh Medical University named after S.D. Asfendiyarov, Tole Bi St., 94, Almaty, 050000, Kazakhstan
The Department of Chemistry and Chemical Technology, Toraigyrov University, Lomov St., 64, Pavlodar, 140008, Kazakhstan

Laboratory of the Thermochemical Processes
Kazakh Medical University named after S.D. Asfendiyarov
The Department of Chemistry and Chemical Technology

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