期刊
INORGANIC CHEMISTRY
卷 51, 期 7, 页码 3953-3955出版社
AMER CHEMICAL SOC
DOI: 10.1021/ic202318b
关键词
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资金
- National Science Foundation [DMR-0907395]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [0907395] Funding Source: National Science Foundation
Two novel, noncentrosymmetric borate fluorides, Sr3B6O11F2 and Ba3B6O11F2, have been synthesized hydrothermally and their structures determined. The compounds are isostructural, crystallizing in space group P2(1), having lattice parameters of a = 6.4093 (13) angstrom, b = 8.2898 (17) angstrom, c = 9.3656 (19) angstrom, and beta = 101.51 (3)degrees for Sr3B6O11F2 and a = 6.5572 (13) angstrom, b = 8.5107 (17) angstrom, c = 9.6726 (19) angstrom, and beta = 101.21 (3)degrees for Ba3B6O11F2. The structure consists of a complex triple-ring borate framework having aligned triangular [BO3] groups that impart polarity. Fluorine atoms are bound only to the alkaline-earth metals and are not part of the borate framework, resulting in a vastly different structure from those of the hydrated borates Sr3B6O11(OH)(2) and Ba3B6O11(OH)(2) with similar formulas. The title compounds are transparent to nearly 200 nm, making them potentially useful for deep-ultraviolet nonlinear-optical applications.
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