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Analysis of Minerals Produced by hFOB 1.19 and Saos-2 Cells Using Transmission Electron Microscopy with Energy Dispersive X-ray Microanalysis
Published on: June 24, 2018
Rare-earth site splitting in Sm3MoO7.
1Laboratoire CRISMAT, UMR CNRS 6508, 6 Boulevard Maréchal Juin, 14050 Caen Cedex 4, France.
Trisamarium molybdenum heptaoxide (Sm(3)MoO(7)) shares structural similarities with lanthanum and praseodymium analogs. A key difference is the observed splitting of one samarium site into two distinct positions within the crystal structure.
Area of Science:
- Solid-state chemistry
- Inorganic materials science
- Crystallography
Background:
- Trisamarium molybdenum heptaoxide (Sm(3)MoO(7)) belongs to the Ln(3)MoO(7) family, known for its structural characteristics.
- Lanthanum (La) and praseodymium (Pr) analogs (La(3)MoO(7) and Pr(3)MoO(7)) exhibit specific crystal structures.
- Understanding the structural nuances of rare-earth metal oxides is crucial for materials development.
Purpose of the Study:
- To elucidate the crystal structure of trisamarium molybdenum heptaoxide (Sm(3)MoO(7)).
- To compare the structural features of Sm(3)MoO(7) with its lanthanum and praseodymium counterparts.
- To identify any unique structural attributes of Sm(3)MoO(7).
Main Methods:
- Single-crystal X-ray diffraction was employed to determine the atomic arrangement.
- Analysis of coordination polyhedra (MoO(6) octahedra and Sm-O polyhedra) was performed.
- Comparison of crystallographic data with related Ln(3)MoO(7) compounds.
Main Results:
- Trisamarium molybdenum heptaoxide (Sm(3)MoO(7)) is confirmed to be isomorphous with La(3)MoO(7) and Pr(3)MoO(7).
- The crystal structure features chains of corner-linked MoO(6) octahedra along the b axis.
- A distinct observation in Sm(3)MoO(7) is the splitting of one samarium (Sm) site into two crystallographically independent positions, unlike its La and Pr analogs.
Conclusions:
- The crystal structure of Sm(3)MoO(7) is characterized by linked MoO(6) octahedra and Sm-O polyhedra.
- The observed site splitting for samarium represents a structural divergence from La(3)MoO(7) and Pr(3)MoO(7).
- This finding contributes to the understanding of structure-property relationships in rare-earth molybdenum oxides.
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