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The Structural Principles that Underlie the Higher Oxides of the Rare Earths
Author(s) -
Kang Z. C.,
Zhang J.,
Eyring L.
Publication year - 1996
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19966220314
Subject(s) - fluorite , supercell , series (stratigraphy) , electron diffraction , crystallography , homologous series , diffraction , materials science , chemistry , theoretical physics , statistical physics , physics , geology , quantum mechanics , metallurgy , thunderstorm , paleontology , meteorology
The structural principle that accounts for the aniondeficient, fluorite‐related homologous series of higher rare earth oxides has awaited the determination of a sufficient number of their structures to test hypotheses. Recent structure refinement of five additional members has permitted extraction of a number of generalizations concerning their crystallization behavior. These general principles are outlined. Furthermore, based on the fluorite structure itself, a phenomenological structural principle is outlined that (1) unifies all known and possible phases in these fluorite‐related systems under one generic formula, (2) models all known structures correctly and (3) enables modeling of any unknown structure or polymorph in the series. All that is required are electron diffraction patterns adequate to determine the supercell and a knowledge of its composition.