Huber, Sebastian and Pfitzner, Arno (2015) Li17Sb13S28: A New Lithium Ion Conductor and addition to the Phase Diagram Li2S-Sb2S3. CHEMISTRY-A EUROPEAN JOURNAL, 21 (39). pp. 13683-13688. ISSN 0947-6539, 1521-3765
Full text not available from this repository. (Request a copy)Abstract
Li17Sb13S28 was synthesized by solid-state reaction of stoichiometric amounts of anhydrous Li2S and Sb2S3. The crystal structure of Li17Sb13S28 was determined from dark-red single crystals at room temperature. The title compound crystallizes in the monoclinic space group C2/m (no.12) with a=12.765(2)angstrom, b=11.6195(8)angstrom, c=9.2564(9)angstrom, =119.665(6)degrees, V=1193.0(2)angstrom(3), and Z=4 (data at 20 degrees C, lattice constants from powder diffraction). The crystal structure contains one cation site with a mixed occupation by Li and Sb, and one with an antimony split position. Antimony and sulfur form slightly distorted tetragonal bipyramidal [SbS5E] units (E=free electron pair). Six of these units are arranged around a vacancy in the anion substructure. The lone electron pairs E of the antimony(III) cations are arranged around these vacancies. Thus, a variant of the rock salt structure type with ordered vacancies in the anionic substructure results. Impedance spectroscopic measurements of Li17Sb13S28 show a specific conductivity of 2.9x10(-9-1)cm(-1) at 323K and of 7.9x10(-6-1)cm(-1) at 563K, the corresponding activation energy is E-A=0.4eV below 403K and E-A=0.6eV above. Raman spectra are dominated by the SbS stretching modes of the [SbS5] units at 315 and 341cm(-1) at room temperature. Differential thermal analysis (DTA) measurements of Li17Sb13S28 indicate peritectic melting at 854K.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | X-RAY-DIFFRACTION; CRYSTAL-STRUCTURE; RAMAN-SPECTROSCOPY; SOLVOTHERMAL SYNTHESIS; 10 GPA; SYSTEM; SB; CU3SBS3; COPPER; CHALCOGENIDES; antimony; ion conductor; lithium; sulfide; thiometalate |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 07 Jun 2019 08:28 |
| Last Modified: | 07 Jun 2019 08:28 |
| URI: | https://pred.uni-regensburg.de/id/eprint/4821 |
Actions (login required)
 |
View Item |
