44 research outputs found
Structural phase transitions and their influence on Cu+ mobility in superionic ferroelastic Cu6PS5I single crystals
Full text linkThe structural origin of Cu+ ions conductivity in Cu6PS5I single crystals is
described in terms of structural phase transitions studied by X-ray
diffraction, polarizing microscope and calorimetric measurements. Below the
phase transition at Tc=(144-169) K Cu6PS5I belongs to monoclinic, ferroelastic
phase, space group Cc. Above Tc crystal changes the symmetry to cubic
superstructure, space group F-43c (a=19.528); finally at 274K disordering of
the Cu+ ions increases the symmetry to F-43m, (a=9.794). The phase transition
at 274K coincides well with a strong anomaly in electrical conductivity
observed in the Arrhenius plot. Diffusion paths for Cu+ ions are evidenced by
means of the atomic displacement factors and split model. Influence of the
copper stechiometry on the Tc is also discussed.Comment: conference pape
Synthesis of new heterocyclic system of 4,5,7,8-tetrahydroimidazo[1,2-c][1,3]thiazolo [4,5-e][1,3,2]diazaphosphinine starting from 2-aroylamino-3,3-dichloroacrylonitrile
No full textReaction ofsym-Tetracyanoethane with Isothiocyanates. Synthesis of bis(2-amino-1-aryl-3,4-dicyanopyrrol-5-yl)disulphide
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Synthesis and crystal structure of a new neodymium cryptate of a ligand derived from 2,6-diformylpyridine
No full textDesign of Peptides Using α,β-Dehydro-residues: Synthesis, Crystal Structure and Molecular Conformation ofN-Boc-L-Val-ΔPhe–ΔPhe-L-Ala-OCH3
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