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The matlockite-type praseodymium(III) oxide bromide PrOBr.
Pia Talmon-Gros1, Christian M Schurz, Thomas Schleid
1Institut für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany.
Acta Crystallographica. Section E, Structure Reports Online
|December 27, 2011
Summary
The crystal structure of praseodymium(III) oxide bromide (PrOBr) features stacked layers of square anti-prisms. These layers are interconnected by secondary contacts between praseodymium and bromide ions.
Area of Science:
- Solid-state chemistry
- Inorganic materials science
- Crystallography
Background:
- Praseodymium(III) oxide bromide (PrOBr) is a rare earth compound with potential applications in materials science.
- Understanding its crystal structure is crucial for predicting and tailoring its properties.
Purpose of the Study:
- To elucidate the detailed crystal structure of PrOBr.
- To describe the coordination environment of the ions within the crystal lattice.
Main Methods:
- Single-crystal X-ray diffraction analysis.
- Analysis of Wyckoff sites and site symmetries.
- Description of coordination polyhedra.
Main Results:
- PrOBr exhibits a layered structure composed of agglomerated square anti-prisms [PrO(4)Br(4)](9-).
- Praseodymium(III) cations are coordinated by four oxide and four bromide anions, resulting in a coordination number of 8.
- Oxide anions are tetrahedrally coordinated by four praseodymium(III) cations.
Conclusions:
- The crystal structure of PrOBr is characterized by specific arrangements of Pr(3+), O(2-), and Br(-) ions.
- The coordination environments and bonding interactions provide insights into the material's stability and potential properties.
