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Ordered Superstructures of Oxygen Ions in La 2 MeO 4+δ (Me = Cu, Ni)
Author(s) -
Loktev V. M.,
Tatarenko H. M.
Publication year - 1991
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.2221660121
Subject(s) - stoichiometry , crystallography , ion , oxygen , decomposition , materials science , superstructure , chemistry , inorganic chemistry , thermodynamics , physics , organic chemistry
Two‐dimensional commensurable ordered superstructures that can arise in La 2 MeO 4+δ (Me = Cu, Ni) crystals are considered. It is shown that stable superstructures with δ = 0.125, 0.25, and 0.5 are formed as long‐range ordering of superstoichiometrical oxygen. The decomposition of a nonstoichiometric La 2 MeO 4+δ compound into the ordered phases with stoichiometric compositions is proposed.