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The double modulation superstructure of the room temperature stable phase of stoichiometric Cu 2 Te
Author(s) -
Vouroutzis N.,
Frangis N.,
Manolikas C.
Publication year - 2005
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200406920
Subject(s) - superstructure , crystallography , electron diffraction , stoichiometry , tetrahedron , octahedron , planar , phase (matter) , diffraction , materials science , perpendicular , electron microscope , modulation (music) , chemistry , crystal structure , optics , physics , geometry , thermodynamics , mathematics , computer graphics (images) , organic chemistry , computer science , acoustics
The structure of the room temperature phase α I ‐Cu 2 Te is studied by means of electron diffraction and high resolution electron microscopy. It is found that the structure is the result of two modulations. The first one is the periodic introduction of planar translation interfaces perpendicular to the [111] c direction of the fcc basic structure. The second one is the ordering of Cu in octahedral and tetrahedral sites, in a way similar to that known for the β‐Cu 2 Se structure. The superstructure unit cell includes twelve Te layers. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)