结构分析表明非线性光学晶体三硼酸铋BiB3 O6的晶胞参数为a1=0 .7116nm ,a2 =0 .4993nm ,a3 =0 .65 0 8nm ,β =10 5 .62° ,每个初基晶胞含有二个分子。在不同几何配置下的激光拉曼光谱观察到了晶体中硼氧四面体和硼氧三角形的特征晶格振动和振动模的分裂。拉曼光谱表明晶体的内部结构有很强的各向异性 ,这就是晶体非线性光学性质的来源 The structural analysis shows that the unit cell parameters of BiB3 O6 for the nonlinear optical crystal bismuth trinoborate are a1 = 0.7116 nm, a2 = 0.4999 nm, a3 = 0.6580 nm and β = 105.62 °. Each elementary crystal Cells contain two molecules. Laser Raman spectroscopy with different geometry configurations observed the characteristic lattice vibrations and vibration mode splitting of boro-oxy tetrahedron and boron-oxygen triangle in the crystal. Raman spectroscopy shows that the internal structure of the crystal has a strong anisotropy, which is the source of non-linear optical properties of the crystal