单斜晶系
发光
晶体结构
化学
结晶学
摩尔比
离子
发射光谱
分析化学(期刊)
谱线
材料科学
物理
催化作用
生物化学
光电子学
色谱法
有机化学
天文
作者
M. Schäfer,Michael Petter,Ingo Hartenbach,Ralf J. C. Locke,Shuang Zhang,Claudia Wickleder,Thomas Schleid
出处
期刊:Crystals
[Multidisciplinary Digital Publishing Institute]
日期:2023-03-16
卷期号:13 (3): 511-511
被引量:3
标识
DOI:10.3390/cryst13030511
摘要
With Tm3F[Si3O10], a new representative of the Ln3F[Si3O10] series could be synthesized by the reaction of Tm2O3, TmF3 and SiO2 (molar ratio: 1:1:3), applying an excess of CsBr as a fluxing agent in gas-tightly sealed platinum crucibles for eight days at 750 °C, and designed to yield Tm3F3[Si3O9] or Cs2TmF[Si4O10]. Single crystals of Tm3F[Si3O10] (monoclinic, P21/n; a = 725.04(6), b = 1102.43(9), c = 1032.57(8) pm, β = 97.185(7)°; Z = 4) appear as pale celadon, transparent, air- and water-resistant rhombic plates. According to its thalenite-type structure, Tm3F[Si3O10] contains catena-trisilicate anions [Si3O10]8− and triangular [FTm3]8+ cations. The three crystallographically different Tm3+ cations are coordinated by seven plus one (Tm1) or only seven anions (Tm2 and Tm3) exhibiting a single F− anion for each polyhedron, additional to the majority of O2− anions. Furthermore, the luminescence properties of the isotypic colorless compound Y3F[Si3O10] doped with Eu3+ (red emission), Tb3+ (green emission) and Er3+ (yellow and infrared emission), respectively, are reported in presenting their different excitation and emission spectra.
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