Synthesis, structure and properties of layered Pr2MoO6‐based oxymolybdates doped with Mg

• Published in: Acta crystallographica. Section B, Structural science Vol. 76; no. 3; pp. 492 - 501
• Main Authors: Voronkova, Valentina I, Antipin, Alexander M, Sorokin, Timofei A, Novikova, Nataliya E, Kharitonova, Elena P, Orlova, Ekaterina I, Kvartalov, Vladimir B, Mikhail Yu Presniakov, Bondarenko, Vladimir I, Vasiliev, Alexander L, Sorokina, Nataliya I
• Format: Journal Article
• Language: English
• Published: Malden Blackwell Publishing Ltd 01.06.2020
• Subjects: Atomic structure; Calorimetry; Crystal lattices; Crystal structure; Crystals; Differential scanning calorimetry; Inductively coupled plasma mass spectrometry; Mass spectrometry; Molybdenum oxides; Molybdenum trioxide; Polycrystals; Praseodymium; Praseodymium oxide; Scanning transmission electron microscopy; Single crystals; Solid solutions; Structural analysis; Thermogravimetry
• ISSN: 2052-5192; 2052-5206
• DOI: 10.1107/S2052520620005740

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.