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The crystal structure of Tm5Re2O12
Ehrenberg1, Hartmann, Wltschek
1Fachgebiet Strukturforschung, Fachbereich Materialwissenschaft, Technische Universität Darmstadt, Petersenstrasse 23, D-64287 Darmstadt, Germany. helmut@steno.st.mw.tu-darmstadt.de
Acta Crystallographica. Section B, Structural Science
|August 6, 2000
Summary
The crystal structure of pentathulium dirhenium dodecaoxide (Tm(5)Re(2)O(12)) was determined using synchrotron diffraction. This study reveals distorted ReO(6) octahedra forming chains, impacting understanding of related rare-earth metal oxide compounds.
Area of Science:
- Solid-state chemistry
- Crystallography
- Materials science
Background:
- Rare-earth metal oxides are crucial in various applications.
- Understanding the crystal structure of these compounds is key to their properties.
- Previous studies on Ln(2)ReO(5) compounds require re-evaluation.
Purpose of the Study:
- To determine the precise crystal structure of Tm(5)Re(2)O(12).
- To analyze the coordination environment of rhenium within the oxide structure.
- To provide a structural basis for re-examining related rare-earth rhenium oxides.
Main Methods:
- Synchrotron X-ray diffraction was employed to collect crystallographic data.
- The crystal structure was solved and refined, accounting for merohedral twinning.
- Analysis of bond distances and coordination polyhedra was performed.
Main Results:
- The crystal structure of Tm(5)Re(2)O(12) was successfully determined.
- Space group C2/m was identified with specific lattice parameters (a, b, c, beta).
- Distorted ReO(6) octahedra were observed, forming chains with alternating Re-Re distances.
Conclusions:
- The determined structure of Tm(5)Re(2)O(12) provides new insights into rare-earth rhenium oxide systems.
- The structural findings necessitate a critical review of prior research on Ln(2)ReO(5) compounds.
- This work contributes to the fundamental understanding of oxide materials containing thulium and rhenium.