Crystal structure and europium luminescence of NaMgH 3-x F x
Crystal structure and europium luminescence of NaMgH 3-x F x
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NaMgH 3-x F x 的晶体结构和铕发光
DOI:
10.1016/j.jssc.2017.10.034
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发表时间:
2018
影响因子:
3.3
通讯作者:
H. Kohlmann
中科院分区:
文献类型:
--
作者:
C. Pflug;A. Franz;H. Kohlmann
The solid solution series NaMgH3−xFx(x = 0, 0.5, 1, 1.5, 2, 2.5, 3) was synthesized by solid-state reactions under hydrogen gas pressure from binary ionic hydrides, fluorides and magnesium. Rietveld refinement based on X-ray powder diffraction data revealed the GdFeO3-structure type for all compounds and a trend of lattice parameters according to Vegard's law. The anion distribution in NaMgD2F and NaMgD1.5F1.5was found to be statistical by Rietveld refinement based on neutron powder diffraction data. Photoluminescence measurements on europium(II) substituted NaMgH3−xFxrevealed a strong red shift of the emission wavelength (λem= 665 nm for NaMgH2F:Eu) in comparison to violet emitting NaMgF3:Eu.
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