During the attempts to improve sealed-quartz tube synthesis of Hg(Re)-1223 superconductor, a new compound was systematically identified in certain unsuccessful experimental conditions. It was characterized by a well distinct powder diffraction pattern with cubic diamond-like extinctions and lattice parameter 8.48-8.53 A. The composition was determined as EfeReo.sBa^ai.sOs.s and an univocal interpretation was found in terms of the high-symmetry space group Fm3m(225), with Z=2, (=6.70 g/cm3 ; the reliability factor was 5.0%. This phase, Cu-free and not superconductive, rather than a precursor can be considered as an unwanted accident in Hg(Re)-1223 preparation route. Its existence was confirmed by a successful synthesis starting from the above reported stoichiometry

(2000). Crystal structure data on a new cubic phase acting as antagonist in the synthesis of Hg(Re)-1223 superconductor . In INTERNATIONAL JOURNAL OF MODERN PHYSICS B. Retrieved from https://hdl.handle.net/10446/274032

Crystal structure data on a new cubic phase acting as antagonist in the synthesis of Hg(Re)-1223 superconductor

Cavallaro, Andrea
2000-01-01

Abstract

During the attempts to improve sealed-quartz tube synthesis of Hg(Re)-1223 superconductor, a new compound was systematically identified in certain unsuccessful experimental conditions. It was characterized by a well distinct powder diffraction pattern with cubic diamond-like extinctions and lattice parameter 8.48-8.53 A. The composition was determined as EfeReo.sBa^ai.sOs.s and an univocal interpretation was found in terms of the high-symmetry space group Fm3m(225), with Z=2, (=6.70 g/cm3 ; the reliability factor was 5.0%. This phase, Cu-free and not superconductive, rather than a precursor can be considered as an unwanted accident in Hg(Re)-1223 preparation route. Its existence was confirmed by a successful synthesis starting from the above reported stoichiometry
2000
Celotti, G.; Tampieri, A.; Cavallaro, Andrea
File allegato/i alla scheda:
File Dimensione del file Formato  
CRYSTAL STRUCTURE DATA ON A NEW CUBIC PHASE ACTING AS ANTAGONIST IN THE SYNTHESIS OF Hg(Re)-1223 SUPERCONDUCTOR.pdf

Solo gestori di archivio

Versione: publisher's version - versione editoriale
Licenza: Licenza default Aisberg
Dimensione del file 687.6 kB
Formato Adobe PDF
687.6 kB Adobe PDF   Visualizza/Apri
Pubblicazioni consigliate

Aisberg ©2008 Servizi bibliotecari, Università degli studi di Bergamo | Terms of use/Condizioni di utilizzo

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10446/274032
Citazioni
  • Scopus 0
  • ???jsp.display-item.citation.isi??? 0
social impact