A new rare‐earth polyborate, trisodium europium octaborate, Na₃EuB₈O₁₅, was prepared using the high‐temperature molten‐salt method and structurally determined by single‐crystal X‐ray diffraction analysis. It crystallizes in the triclinic space group P and contains a one‐dimensional [B₈O₁₅]_∞ tube structure that is constructed from BO₃ and BO₄ polyhedra. The Eu³⁺ and Na⁺ cations reside in this structure to ensure cohesion and neutrality. The excitation spectra, emission spectra, decay time and Commission Internationale de l'Éclairage (CIE) chromaticity index of Na₃EuB₈O₁₅ were studied. Under near‐UV light excitation (393 nm), the polyborate shows an intense red emission, which mainly originates from the highest intensities of the ⁵D₀→⁷F₁ and ⁵D₀→⁷F₂ transitions.

中文翻译：

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新型红色荧光粉Na3EuB8O15，具有开窗管状结构

使用高温熔融盐法制备了一种新的稀土多硼酸八硼酸三钠euro钠₃ EuB ₈ O ₁₅，并通过单晶X射线衍射分析确定了结构。它在三斜空间群P中结晶，并包含由BO ₃和BO ₄多面体构成的一维[B ₈ O ₁₅ ] _∞管结构。Eu ³⁺和Na ⁺阳离子保留在该结构中以确保凝聚力和中性。研究了Na ₃ EuB ₈ O ₁₅的激发光谱，发射光谱，衰减时间和CIE色度指数。在近紫外光激发下（393 nm），多硼酸盐显示出强烈的红色发射，主要来自⁵ D ₀ → ⁷ F ₁和⁵ D ₀ → ⁷ F ₂跃迁的最高强度。