Abstract
Two novel ternary polyselenides, Ba7Sn2Se14 and Ba3Sb2Se7 were synthesized by solid-state reaction. They crystallize in new structure types, and both have Se-Se bonds. The products were characterized, and the structures were determined. In addition, we did the measurements of physical properties. Besides, we also discovered a potential of unknown in Eu/Sr-Si-Cu-Se system. Ba7Sn2Se14 was synthesized at 1,123 K. It crystallizes in the monoclinic space group Cm. The structure is constructed of SnSe4 tetrahedra, Se22- diselenides and Ba2+ cations. Measurements of physical properties indicate the semiconducting behavior, and theoretical calculations stand for it. Ba3Sb2Se7 was synthesized at 1,023 K. It crystallizes in the orthorhombic space group Cmcm. The structure is constructed of Sb4Se1412- units, and Ba2+ cations isolate the units. The basic unit Sb4Se1412- is constructed of two SbSe4 seesaws and two SbSe5 seesaws. Four seesaws connect alternately in corner-sharing to form a quadrilateral unit. Measurements of physical properties indicate the semiconducting behavior, and theoretical calculations stand for it. Furthermore, we also discussed the possibility of Ba3Sb2Se7+x (x = 0 – 0.5).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
