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- W2065584775 abstract "The luminescence of MgTa2O6 (trirutile structure) and ZnTa2O6 (tri-α-PbO2 structure) are reported and discussed in connection with the luminescence of related compounds, especially the niobates with columbite structure. The maximum of the excitation band of the luminescence of the two tantalates is at 280 nm, a value lower in energy than that for the niobates. The emission band has its maximum at 500 nm (MgTa2O6) and 450 nm (ZnTa2O6). The quantum efficiency is low, reaching 15% (MgTa2O6) and 30% (ZnTa2O6) at 4.2 K. It is argued that the phenomena observed for these compounds indicate that the excitons, formed upon photoexcitation, are mobile, whereas in the columbite niobates they are localized due to self-trapping." @default.
- W2065584775 created "2016-06-24" @default.
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- W2065584775 date "1988-01-01" @default.
- W2065584775 modified "2023-09-24" @default.
- W2065584775 title "The influence of crystal structure on the luminescence of tantalates and niobates" @default.
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- W2065584775 doi "https://doi.org/10.1016/0022-4596(88)90010-2" @default.
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