Journal
DALTON TRANSACTIONS
Volume 48, Issue 1, Pages 21-24Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8dt03348j
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Funding
- National Natural Science Foundation of China [21527804]
- National Key Research and Development Program of China [2016YFB0402103]
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A new sodium-rich fluorooxoborate Na3B7O11F2 features a novel large [B14O24F4] ring formed by two corner-shared [B7O13F2] groups, each containing two [B3O7] anionic units linked by a [BO2F2] group. The band gap of the title compound calculated by using first-principles calculations is 7.69 eV (similar to 161 nm) and the birefringence refractive index is 0.083 at 193 nm. The results show that it is potentially an excellent deep-ultraviolet (DUV) birefringence crystal.
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