Rare-earth Tungstate (Rare-earth Tungstate, Chemical Formula A2W3O12 (A=Y, Er, Ho, Yb…) is a class of compounds composed of rare earth elements and tungstate ions. Rare earth elements refer to the lanthanide elements in the periodic table (including lanthanum, cerium, gadolinium, gadolinium, terbium, europium, holmium, erbium, thulium, ytterbium, lutetium, etc.), which have unique electronic structures and chemical properties. The chemical formula of rare earth tungstates is usually RE₂ (WO₄)₃, where RE represents a rare earth element. Their crystal structure can be in various forms, such as monoclinic, orthorhombic, or hexagonal, depending on the size and charge of the rare earth element and tungstate. Rare earth tungstates generally have good chemical and thermal stability, and exhibit excellent optical properties at high temperatures.
Due to the special properties of rare earth elements and tungstates, rare earth tungstates are widely used in the fields of optical materials, electronic devices, catalysts and luminescent materials. For example, they can be used to prepare high-temperature stable optical coatings, fiber amplifiers and laser materials, to prepare phosphors in optoelectronic devices and electronic display devices, and to be used in redox reactions and acid-base reactions in catalysts. The specific properties and applications of rare earth tungstates depend on factors such as the selection, proportion and impurity doping of rare earth elements. Different rare earth elements and ratios can adjust their optical, electrical and magnetic properties to meet the needs of different fields. Therefore, in specific research and application, it is necessary to understand its properties and uses according to specific compounds and needs.
The A2W3O12 rare earth tungstate material (A=Y, Er, Ho, Yb…) was prepared by high-temperature solid-state reaction method, and its structure, unit cell parameters and unit cell volume at different temperatures were determined by room temperature and high temperature XRD, and its structure was refined by TOPSA software.
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