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Dimensionality of the oxidic layers in pnictide oxides and transition metal p ‐element ordering in tetrelides and pnictides
Author(s) -
Bartsch Timo,
Johrendt Dirk,
Pöttgen Rainer
Publication year - 2017
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.201600084
Subject(s) - pnictogen , superstructure , transition metal , condensed matter physics , crystal structure , element (criminal law) , crystallography , curse of dimensionality , materials science , superconductivity , chemistry , physics , law , political science , computer science , thermodynamics , catalysis , biochemistry , machine learning
Pnictide oxides exhibit a rich crystal chemistry, which is much more than the ZrCuSiAs structure of LaFeAsO, the mother ‐structure of the 1‐1‐1‐1 materials. The present micro‐review focuses on different dimensionalities in the oxidic and the pnictide substructures, largely extending the structural building units. The second part concerns BaAl 4 /ThCr 2 Si 2 superstructures, which extend the crystal chemistry of BaFe 2 As 2 . Key parameters for superstructure formation are either an ordering of the transition metal and p ‐element atoms ( coloring ) or an ordering of vacancies.