Syntheses, Structure, and Characterization of Crystal La6Ba4(SiO4)6F2, a Promising Laser Host

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• 作者：Xinghong Gong ; Yanfu Lin ; Yujin Chen ; Zixiang Huang ; Yidong Huang ; and Zundu Luo
• 刊名：Chemistry of Materials
• 出版年：2005
• 出版时间：March 8, 2005
• 年：2005
• 卷：17
• 期：5
• 页码：1135 - 1138
• 全文大小：141K
• 年卷期：v.17,no.5(March 8, 2005)
• ISSN：1520-5002

文摘

La₆Ba₄(SiO₄)₆F₂ crystals have been obtained from a BaF₂-NaF flux system and a melt system. Thecompound crystallizes in the hexagonal system, space group P6₃/m, with a = 9.8000(10) Å, c = 7.3193(8) Å, and one formula unit per cell. La₆Ba₄(SiO₄)₆F₂ has an apatite structure, and all available evidenceindicates that both the 6h and 4f lattice sites are occupied by La³⁺ and Ba²⁺ together. The absorptionspectrum, emission spectrum, and fluorescence lifetime of the Yb³⁺-doped La₆Ba₄(SiO₄)₆F₂ crystal werealso detected, and the wide and high emission band indicates that the crystal is a promising host forgeneration of ultra-short-pulse and tunable solid-state lasers.