Synthesis Of The FeIn2Se4 Compounds

Abstract

•     Indium is transferred by the tartaric acid in the strong complex in aqueous medium. Then the selenizing solution (solution of selenium on sodium tetraborate) is added. The voluminous sediment of yellow color turns out. Composition of the determined by differential thermal analysis and electron microprobe analysis. The qualitative analysis of this sediment has shown the presence of indium and selenium. In various experiments are produced sediments of different colors when medium pH changes. The set of experiments has been carried out to specify color change and hydrogen ions concentration impact. This FeIn₂Se₄ compound for production FeSO₄x7H₂O is mixed with In₂Se₄ in the molar ratios 2:3 (FeIn₂Se₄)  with the presence of acetate acid (pH=7-3), at 293-353 K in aqueous medium. In organic medium test within 10 hours at 413 – 443 K to temperature remains in the furnace. Phase analysis of FeIn₂Se₄  is studied using the X-ray powder diffraction (XRD) and chemical analysis. The compound FeIn₂Se₄  crystallized in hexagonal singoniya a=4.012 Å, c=39.21 Å. Morphological investigations have been performed using scanning electron microscopy (SEM). Optical absorption is measured using a spectrophotometer, IK spektr analysis on the basis of the spectrum, which has been read from the dispersed solution of FeIn₂Se₄ is calculated. Differential thermal analysis (DTA) ofFeIn₂Se₄ compound is observed one endothermic effect. In the system T_g=1158 K aqueous medium, T_g=1123 K organic medium endothermic effect corresponds to the melting point of the combination. In this iron indium selenide efficiency is 92.2 %. 
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Keywords

• iron indium selenide,differential thermal analysis,sedimentation speed,chemical analyses,scanning electron microscopy

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