Synthesis, structure and characterization of two new silver-iron based phosphates AgFe2(PO4)2F(H2O)2 and Ag3Fe2(PO4)(HPO4)3

被引：1
作者：
Li, Ningxia [1 ,2 ]
Luo, Qi [1 ]
Cui, Meiyan [1 ]
Zhao, Zhiying [1 ]
He, Zhangzhen [1 ]
机构：
[1] Chinese Acad Sci, Fujian Inst Res Struct Matter, State Key Lab Struct Chem, Fuzhou 350002, Peoples R China
[2] Fuzhou Univ, Coll Chem, Fuzhou 350108, Peoples R China
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2024年 / 338卷
基金：
中国国家自然科学基金;
关键词：
Phosphates; Hydrothermal method; Crystal structure; Magnetic properties; ELECTRONIC-STRUCTURE; ELECTROCHEMISTRY; SPECTROSCOPY; CONDUCTION; SPECTRA; RAMAN; CR; FE;
D O I：
10.1016/j.jssc.2024.124868
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Two new silver-iron based phosphates AgFe2(PO4)2F(H2O)2 (1) with monoclinic P21/n and Ag3Fe2(PO4)(HPO4)3 (2) with triclinic P-1 were synthesized by a conventional hydrothermal method, featuring a dimer structure and a twisted honeycomb-like lattice, respectively. XPS and BVS (Bond Valence Sum) calculations indicated only Fe3+ ions in both compounds, while FT-IR spectra proved the presence of [H2O] in 1 and [OH] groups in 2. Solid-state UV-vis-NIR diffuse reflectance spectra suggested their wide optical band gaps of 2.31 eV and 1.94 eV, respectively. Magnetic measurements indicated that both compounds display a long-range antiferromagnetic ordering at low temperature, showing the change of magnetic entropy of 9.59 J mol-1 K-1 in 1 and that of 14.87 J mol-1 K-1 in 2, respectively.
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