| Autor: |
Chen, Jianbang, Zhang, Jie, Zhu, Aixin, Huang, Xuchu |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 11/7/2022, Vol. 46 Issue 41, p19629-19632, 4p |
| Abstrakt: |
Two new quaternary rare-earth borates, Li7MIIScB12O24 (MII = Sr, Ba0.6Ca0.4), crystallizing in the centrosymmetric space group R3¯ were synthesized by a high-temperature solution method and characterized. They are isostructural and exhibit a three-dimensional anionic [ScB12O24]9− framework composed of B6O14 groups and ScO6 octahedra with alkali- and alkaline-earth metal cations occupying the cavities and keeping the charge balance. The UV-Vis-NIR diffuse reflectance spectrum shows that the cutoff edge of Li7SrScB12O24 is less than 200 nm, which indicates its potential application in the deep UV region. Li7MIIScB12O24 (MII = Sr, Ba0.6Ca0.4) will become a new type of rare-earth borates that have a deep-UV cutoff edge (≤200 nm). Furthermore, infrared spectroscopy and thermal analysis were carried out and the results were analyzed. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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