Acta crystallographica Section B, Structural science, crystal engineering and materials · 2020
Synthesis, structure and properties of layered Pr2MoO6-based oxymolybdates doped with Mg.
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Voronkova Valentina I, Antipin Alexander M, Sorokin Timofei A, Novikova Nataliya E, Kharitonova Elena P, Orlova Ekaterina I, Kvartalov Vladimir B, Presniakov Mikhail Yu, Bondarenko Vladimir I, Vasiliev Alexander L, Sorokina Nataliya I
Аннотация
Undoped and Mg-doped Pr2MoO6 oxymolybdate polycrystals and single crystals have been prepared by solid-state reactions and flux growth. The compounds have been characterized by powder X-ray diffraction, energy-dispersive spectroscopy, inductively coupled plasma mass spectrometry, scanning transmission electron microscopy, single crystal X-ray structure analysis, differential scanning calorimetry and thermogravimetry. The (MgO)x(Pr2O3)y(MoO3)z (x + y + z = 1) solid solution series has been shown to extend to x = 0.03. The structure of the Mg-doped Pr2MoO6 single crystals can be represented as superimposed lattices of the main matrix (Pr2MoO6) and lattices in which Mo atoms are partially replaced by Mg. The incorporation of Mg atoms into the structure of Pr2MoO6 results in the disordering of the praseodymium and oxygen lattices. Both the polycrystalline and single-crystal Mg-doped samples are hygroscopic.