首次以LiF-H3BO3为助熔剂,用顶部籽晶法,生长出尺寸为12 mm×13mm×5mm的Ba2B5O9Cl透明单晶.通过热性能分析证实该晶体为非同成分熔融化合物,属于正交晶系,空间群Pnn2,晶胞参数为a=1.1576(2) nm,b=1.1619(2)nm,c =0.66874(13) nm,V=0.8994(3) nm3,Z=4.该晶体中含有BO3和BO3基团,具有三维网状的晶体结构.Ba2B5O9Cl粉末的非线性光学效应约为KDP的3.5倍,同时还进行了红外、漫反射光谱性能的研究.
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