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简要报道了新型双折射晶体高温相偏硼酸钡α－ＢａＢ２Ｏ４晶体在国内外属首次的人工合成，与天然方解石、钒酸钇作了比较，测试了５３２ｎｍ的折射率α－ＢａＢ２Ｏ４晶体是一种理想的紫外双折射晶体。
The novel birefringent crystal phase Ba-BaB2O4 with high temperature is reported in this paper for the first time in China and abroad. Compared with natural calcite and yttrium vanadate, the crystal of α-BaB2O4 with a refractive index of 532 nm is tested as an ideal UV birefringent crystal.