Schmid, Martin and Wegner, Florian and De Giorgi, Claudia and Pielnhofer, Florian and Pfitzner, Arno (2024) The cubic structure of Li3As stabilized by substitution - Li8TtAs4 (Tt = Si, Ge) and Li14TtAs6 (Tt = Si, Ge, Sn) and their lithium ion conductivity. DALTON TRANSACTIONS, 53 (27). ISSN 1477-9226, 1477-9234
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The new lithium arsenidotetrelates Li8SiAs4, Li8GeAs4, Li14SiAs6, Li14GeAs6 and Li14SnAs6 were synthesized via ball milling and structurally characterized by Rietveld analysis of X-ray powder diffraction data. The aliovalent substitution of lithium in hexagonal Li3As by introducing a tetravalent tetrel cation stabilizes cubic structures for Li(8)TtAs(4) (Tt = Si, Ge) in the space group Pa (3) over bar and for the lithium richer compound Li(14)TtAs(6) (Tt = Si, Ge, Sn) in the higher symmetrical space group Fm (3) over barm (no. 225). Thermal properties of the arsenidotetrelates were investigated via high temperature powder diffraction and differential thermal analysis revealing a decomposition process of the lithium richer arsenidotetrelate (Li(14)TtAs(6) -> Li(8)TtAs(4) + 2Li(3)As) into the lithium poorer arsenidotetrelates and lithium arsenide at moderate temperatures. Impedance spectroscopy shows moderate to good lithium ion conductivity for the lithium arsenidotetrelates.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | CRYSTAL-STRUCTURE; SIAS2; |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie Chemistry and Pharmacy > Institut für Anorganische Chemie > Chair Prof. Dr. Arno Pfitzner |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Jul 2025 08:09 |
| Last Modified: | 25 Jul 2025 08:09 |
| URI: | https://pred.uni-regensburg.de/id/eprint/63752 |
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