Author:
Nuss Jürgen,Jansen Martin
Abstract
The novel antimonide oxides Pr9Sb5O5, Sm9Sb5O5 and Dy9Sb5O5 were synthesized from the respective RESb, the rare-earth metals (RE = Pr, Sm, Dy), and RE
2O3 (RE = Sm, Dy) or Pr4O7, respectively, in sealed tantalum ampoules at 1920 K. Those compounds, which are sensitive against air and moisture, form black cube-like crystals with metallic lustre. They crystallize in the La9Sb5O5 type of structure, which represents a fivefold superstructure of the KCoO2 structure: O10K5Co5 \^= La9□Sb5O5. The investigated crystals of the Sm and Dy compounds were twinned using the reticular merohedral law, with the twin symmetry 4/mm′m′, and the (310) and (120) mirror planes as twinning symmetry elements. The twin index is [j] = 5.
Publisher
International Union of Crystallography (IUCr)
Subject
General Biochemistry, Genetics and Molecular Biology,General Medicine
Cited by
20 articles.
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