Pentaeuropium dicadmium pentaantimonide oxide, Eu5Cd2Sb5O
2011
Structure of Eu5Cd2Sb5O
publication
Evidence: moderate
Author Information
Author(s): Saparov Bayrammurad, Bobev Svilen
Primary Institution: University of Delaware
Conclusion
The compound Eu5Cd2Sb5O has a unique crystal structure with fully occupied oxygen sites, which is unexpected given its formula suggests a one-electron deficiency.
Supporting Evidence
- The structure contains one-dimensional [Cd2Sb5]9- polyanions and isolated O2- ions surrounded tetrahedrally by Eu cations.
- Similar strong homoatomic Sb–Sb interactions are found in related polyanionic structures.
- Band structure calculations indicate the importance of ionic interactions near the Fermi level.
Takeaway
Scientists studied a new material called Eu5Cd2Sb5O, which has a special arrangement of atoms. They found that it has a fully occupied oxygen site, which is surprising because they thought it should have some empty spaces.
Methodology
The structure was determined using X-ray diffraction data collected from a single crystal of the compound.
Limitations
Magnetic measurements could not be performed due to the unavailability of phase-pure samples.
Digital Object Identifier (DOI)
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