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Synthesis and characterization of a new magnesium molybdates Tl1.85M0.15Mg2(MoO4)3 (M = K, Rb) with a langbeinite type structure
Solid State Sciences ( IF 3.4 ) Pub Date : 2023-07-01 , DOI: 10.1016/j.solidstatesciences.2023.107249
Victoria G. Grossman , Maxim S. Molokeev , Bair G. Bazarov , Jibzema G. Bazarova

In this work we have successfully synthesized pure phases of Tl1.85M0.15Mg2(MoO4)3 (M = K, Rb) langbeinite powders using the solid-state reaction method. Structural characterization was carried out via the Rietveld method on the X-ray powder diffraction data. The following unit cell parameters are calculated for Tl1.85K0.15Mg2(MoO4)3: a = 10.68509(16) Å, V = 1219.93(6) Å3, and for Tl1.85Rb0.15Mg2(MoO4)3: a = 10.69463(9) Å, V = 1223.20(3) Å3. The electrical conductivity was studied by impedance spectroscopy in the [473–1010 K] temperature range and results show that the Tl1.85M0.15Mg2(MoO4)3 (M = K, Rb) were ionic solid electrolyte conductors. Results also show that Tl1.85K0.15Mg2(MoO4)3 has the highest electrical conductivity.



中文翻译:

具有钙锰矿型结构的新型钼酸镁 Tl1.85M0.15Mg2(MoO4)3 (M = K, Rb) 的合成与表征

 在这项工作中,我们采用固相反应方法成功合成了纯相Tl 1.85 M 0.15 Mg 2 (MoO 4 ) 3 ( M = K, Rb) 镁锰矿粉末。通过 Rietveld 方法对 X 射线粉末衍射数据进行结构表征。以下晶胞参数针对 Tl 1.85 K 0.15 Mg 2 (MoO 4 ) 3进行计算:a  = 10.68509(16) Å, V  = 1219.93(6) Å 3,以及 Tl 1.85 Rb 0.15 Mg 2 (MoO)4 ) 3 : a  = 10.69463(9) 埃, V  = 1223.20(3) 埃3 。通过阻抗谱研究了[473–1010 K]温度范围内的电导率,结果表明Tl 1.85 M 0.15 Mg 2 (MoO 4 ) 3 ( M  = K, Rb)是离子固体电解质导体。结果还表明,Tl 1.85 K 0.15 Mg 2 (MoO 4 ) 3具有最高的电导率。

更新日期:2023-07-01
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