Journal
CRYSTAL GROWTH & DESIGN
Volume 20, Issue 4, Pages 2135-2140Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.cgd.9b01677
Keywords
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Funding
- National Natural Science Foundation of China [21527804, 51890864]
- National Key Research and Development Program of China [2016YFB0402103]
- Fujian Institute of Innovation, Chinese Academy of Sciences [FJCXY18030101]
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The first alkali metal rare-earth iodate fluoride, Li2Ce(IO3)(4)F-2, was synthesized using a hydrothermal method. This compound features a novel [CeI4O12F2](infinity) infinite layer with each [CeO6F2] dodecahedron connected to six parallel umbrella-like [IO3] groups. Each layer is connected by [Li2I2O8F2] rings to form a condensed 3D structure. The first-principles calculations indicate that Li2Ce(IO3)(4)F-2 possesses moderate birefringence (Delta n = 0.054, Delta = 589 nm), which is mainly originated from the umbrella-like [IO3] group and the [CeO6F2] polyhedrons. Li2Ce(IO3)(4)F-2 is possibly a birefringence crystal for visible light.
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