کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1313818 1499332 2014 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Synthesis, crystal structure and ion mobility in the complex fluorides of antimony (III) with the lithium cation
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Synthesis, crystal structure and ion mobility in the complex fluorides of antimony (III) with the lithium cation
چکیده انگلیسی


• Two crystalline compounds of antimony(III) LiSb2F7 and LiSbF4 were obtained.
• The lithium heptafluorodiantimonate(III) was first synthesized.
• LiSbF4 complex compound represents a new structural type.
• It was found the presence of ion diffusion in the lithium sublattice.

Two compounds LiSb2F7 (I) and LiSbF4 (II) were synthesized from aqueous solutions of LiNO3·3H2O and Sb2O3 in the presence of HF and studied by the X-ray diffraction, IR and 7Li, 19F NMR spectroscopy. The first obtained lithium heptafluorodiantimonate(III) LiSb2F7 belongs to the orthorhombic system, the space group Pnma. The unit cell contains four formula units consisting of Sb2F7 groups. The structure is formed by Li+ cations and dimeric [Sb2F7]− complex anions.The crystal structure of lithium tetrafluorodiantimonate(III) LiSbF4 is a new structural type in the group of tetrafluoroantimonates(III) with alkali metal cations. The main structural units of LiSbF4 are SbF3E groups linked through the bridge fluorine atoms into a three-dimensional framework and the cations Li+. The compound crystal belongs to the cubic system, space group P213, and contains three formula units per the unit cell. It was found that in the temperature range 150–420 K in the compound II structure there is a lithium cation transition from a rigid lattice to diffusion, while in the fluoride subsystem there are no ion motions with frequencies above 104 Hz in the entire temperature range (150–450 K).

Two compounds LiSb2F7 and LiSbF4 were synthesized from aqueous solutions of LiNO3·3H2O and Sb2O3 in the presence of HF. The structure of LiSb2F7 is formed by Li+ cations and dimeric [Sb2F7]− complex anions. The main structural units of LiSbF4 are SbF3E groups linked through the bridge fluorine atoms into a three-dimensional framework and the cations Li+.Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Fluorine Chemistry - Volume 168, December 2014, Pages 184–188
نویسندگان
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