v-PrBO3的晶体结构、相变和光学性质

doi:10.3724/SP.J.1077.2013.13123

无机材料学报 ›› 2013, Vol. 28 ›› Issue (10): 1153-1157.DOI: 10.3724/SP.J.1077.2013.13123 CSTR: 32189.14.SP.J.1077.2013.13123

v-PrBO₃的晶体结构、相变和光学性质

金滕滕^1,2, 张志军¹, 张辉¹, 赵景泰¹

(1.中国科学院上海硅酸盐研究所，中国科学院透明光功能无机材料重点实验室，上海200050；2.中国科学院大学，北京100039)

收稿日期:2013-03-06 修回日期:2013-05-16 出版日期:2013-10-20 网络出版日期:2013-09-18
作者简介:金滕滕. E-mail: ttjin2008@126.com
基金资助:
National Natural Science Foundation of China(11104298)

Crystal Structure, Phase Transition and Optical Properties of ν-PrBO₃

JIN Teng-Teng^1,2, ZHANG Zhi-Jun¹, ZHANG Hui¹, ZHAO Jing-Tai¹

(1. Key Laboratory of Transparent Opto-Functional Inorganic Materials of Chinese Academy of Sciences, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2. University of Chinese Academy of Sciences, Beijing 100039, China)

Received:2013-03-06 Revised:2013-05-16 Published:2013-10-20 Online:2013-09-18
About author:JIN Teng-Teng(1986-), female, PhD candidate. E-mail: ttjin2008@126.com
Supported by:
National Natural Science Foundation of China(11104298)

摘要/Abstract

摘要： 采用高温固相合成法分别在1200和1500℃合成了λ-PrBO₃和ν-PrBO₃样品, 并通过单晶X射线衍射确定了ν-PrBO3的晶体结构。结果表明该结构为三斜晶系, 空间群为P1, 晶胞参数为a = 0.6302 (4) nm, b = 0.6521 (4) nm, c = 0.6525 (4) nm, α = 94.312(7) °, β = 107.335(7) °, γ = 106.455(7) °, V = 0.2417(2) nm³, Z = 4。同时研究了从λ-PrBO₃到ν-PrBO₃的相变过程, 并从漫反射光谱得出λ-PrBO3和?-PrBO3的光学带隙均为4.96 eV。在X射线和紫外激发下,均未观测到λ-PrBO3和?-PrBO3样品在紫外可见波长范围内的Pr³⁺特征发光。

关键词: ν-PrBO₃晶体结构, 相变, 光学性质

Abstract: The praseodymium orthoborates λ-PrBO₃ and ν-PrBO3 were synthesized from Pr₆O₁₁ and H₃BO₃ by solid state reaction method at 1200 and 1500℃, respectively. The crystal structure of ν-PrBO₃was refined on the basis of single-crystal X-ray diffraction data. It crystallizes in the triclinic system belonging to space group Pwith lattice parameters: a = 0.6302 (4) nm, b = 0.6521 (4) nm and c = 0.6525 (4) nm, and α = 94.312(7)°, β = 107.335(7)°, γ = 106.455(7)°, V = 0.2417(2) nm³, Z = 4. The phase transition process from λ-PrBO₃ to ν-PrBO₃ was also investigated. The optical band gaps of λ-PrBO₃ and ν-PrBO₃ are both determined to be about 4.96 eV according to the diffuse reflection spectra. There is no emission of Pr3+ in the visible range for both of λ-PrBO3 and ν-PrBO₃under X-ray and UV excitation.

Key words: ν-PrBO₃ crystal structure, phase transition, optical properties

中图分类号:

金滕滕, 张志军, 张辉, 赵景泰. v-PrBO₃的晶体结构、相变和光学性质[J]. 无机材料学报, 2013, 28(10): 1153-1157.

JIN Teng-Teng, ZHANG Zhi-Jun, ZHANG Hui, ZHAO Jing-Tai. Crystal Structure, Phase Transition and Optical Properties of ν-PrBO₃[J]. Journal of Inorganic Materials, 2013, 28(10): 1153-1157.

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v-PrBO₃的晶体结构、相变和光学性质

Crystal Structure, Phase Transition and Optical Properties of ν-PrBO₃

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