Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7987935 | Solid State Communications | 2018 | 4 Pages |
Abstract
Mazes of contradictory conclusions have been obtained by previous researches about structural phase transition process of SmF3. In this paper, the single crystals of SmF3 (hexagonal and orthorhombic) were prepared by solid-solid synthesis, which have shown gradual changes in crystal growth modes with the increase temperature and holding time. Furthermore, we propose the phase transition process of in SmF3. Hexagonal symmetry of SmF3 (space group Pnma) was prepared firstly by heating Sm2O3 and NH4HF2 over 40â¯min at 270â¯Â°C. And then orthorhombic symmetry of SmF3 (space group P63mc) was obtained by heating hexagonal symmetry over 10â¯h at 650â¯Â°C. The reaction of SmF3 (hexagonal)â¯=â¯SmF3 (orthorhombic) is extremely sluggish at a low temperature (less than 650â¯Â°C), which was seen as a Mixed Grown Region.
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Qi-Cao Yan, Xing-Min Guo,