The solid-state and sol-gel synthesis of Nd₅Mo₃O_16+δ neodymium molybdate has been investigated. The sequence of chemical transformations was studied using differential thermal analysis, X-ray diffraction analysis, and infrared spectroscopy. It has been demonstrated that the solid-state synthesis occurs stepwise through the formation of Nd₂(MoO₄)₃ and phases with monoclinic structures. The using of the sol-gel method allows obtaining a single-phase neodymium molybdate directly after decomposition of the organic precursor and decreasing of the synthesis temperature by 200 K. The investigation of the crystal structure was carried out by high resolution neutron diffraction, which revealed non-uniform changes in the neodymium-oxygen interatomic distances with increasing temperature.

研究了Nd ₅ Mo ₃ O _16+δ钼酸钕的固态和溶胶-凝胶合成。使用差热分析、X 射线衍射分析和红外光谱研究了化学转化的顺序。已经证明，固态合成通过Nd ₂ (MoO ₄ ) ₃和单斜结构相的形成逐步发生。使用溶胶-凝胶法可以在有机前驱体分解并将合成温度降低 200 K 后直接获得单相钼酸钕。通过高分辨率中子衍射对晶体结构进行了研究，结果表明随着温度的升高，钕-氧原子间距离发生不均匀变化。