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On the Superstructures of Ta 2 O 5 and Nb 2 O 5
Author(s) -
Spyridelis J.,
Delavignette P.,
Amelinckx S.
Publication year - 1967
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19670190220
Subject(s) - tantalum , niobium , stoichiometry , diffraction , tantalum pentoxide , materials science , crystallography , shear (geology) , line (geometry) , unit (ring theory) , niobium pentoxide , superstructure , chemistry , geometry , thermodynamics , optics , physics , mathematics , metallurgy , composite material , mathematics education
The superstructures of tantalum and niobium pentoxide are studied. The observations made support the assumption that these, and related crystals, have a “shear structure” and that this shear structure can be observed directly. It is shown that the size of the unit cell depends on the exact stoichiometry of the compound. A model is proposed which explains both the details of the diffraction pattern and the geometry of the line system.