采用高温固相合成法分别在1200和1500℃合成了λ-PrBO3和v-PrBO3样品,并通过单晶X射线衍射确定了v-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v-PrBO3的相变过程,并从漫反射光谱得出λ-PrBO3和v-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v-PrBO3样品在紫外可见波长范围内的pr3+特征发光.
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