Preparation method investigation and structure identification by XRD and Raman techniques for A2B2O7 composite oxides

• DOI: 10.1111/jace.19645
• Publication Date: 2024-01-03T06:55:17Z
• Authors: Shijing Zhang; Junwei Xu; Chengxin Lu; Rumeng Ouyang; Jiamei Ma; Xusheng Zhong; Xiuzhong Fang; Xianglan Xu; Xiang Wang
• Keywords: Fluorite

Abstract A 2 B O 7 oxides comprise four subcrystalline phase structures, which include the layered perovskite, pyrochlore, disordered defect fluorite, and rare‐earth C‐type structures. Herein, a series of have been synthesized using simple methods, X‐ray diffraction (XRD) Raman spectroscopic characteristics their structures are systematically summarized. It was found that r / ratio can be used to correctly determine structure when A‐site ions ions. Although main‐group metal ions, cannot accurately probably due f electrons. spectroscopy proves most effective method for determining structure, is followed by XRD. The characteristic spectral bands fluorites closely related B‐site ion with fluorite For these ratios located at edge value possessing same elemental composition, different prepared adopting synthesis methods calcination temperatures. crystal comprising two types lower disorder degree more stable high