The crystal structure of Tm5Re2O12

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.