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首页> 外文期刊>Journal of Crystal Growth >New form of the Cs_2O-B_2O_3 phase diagram
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New form of the Cs_2O-B_2O_3 phase diagram

机译:Cs_2O-B_2O_3相图的新形式

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Following the determination of the structures of several anhydrous cesium borates and especially two new compounds with original formula, Cs_3B_7O_(12) and Cs_3B_(13)O_(21), a new form of the Cs_2O-B_2O_3 phase diagram is presented. Thermal analyses using DTA and temperature-resolved X-ray powder diffraction were performed to determine the thermal properties of some compounds. CsBO_2, CsB_3O_5, CsB_5O_8 (variety Ⅳ) and CsB_9O_(14) melt congruently at 720℃, 835℃, 670℃ and 597℃, respectively. The other borates melt incongruently at 620℃ for Cs_2B_4O_7, 685℃ for Cs_3B_7O_(12) (B/Cs = 2.33) and 663℃ for Cs_3B_(13)O_(21) (B/Cs = 4.33). These two latter replace Cs_4B_(10)O_(17) (B/Cs = 2.5) and Cs_2B_8O_(13) (B/Cs = 4) in the phase diagram, respectively. CsB_9O_(14) and CsB_3O_5 crystallize in a non-centrosymmetric space group that leads to non-linear optical properties, which have already been studied for the latter.
机译:在确定了几种无水硼酸铯的结构,尤其是两种具有原始化学式的新化合物Cs_3B_7O_(12)和Cs_3B_(13)O_(21)的结构后,提出了一种新形式的Cs_2O-B_2O_3相图。使用DTA和温度分辨X射线粉末衍射进行热分析,以确定某些化合物的热性能。 CsBO_2,CsB_3O_5,CsB_5O_8(品种Ⅳ)和CsB_9O_(14)分别在720℃,835℃,670℃和597℃下熔融。 Cs_2B_4O_7的其他硼酸盐熔化温度分别为620℃,Cs_3B_7O_(12)(B / Cs = 2.33)的熔化温度为685℃,Cs_3B_(13)O_(21)(B / Cs = 4.33)的熔化温度为663℃。后两个在相图中分别替换Cs_4B_(10)O_(17)(B / Cs = 2.5)和Cs_2B_8O_(13)(B / Cs = 4)。 CsB_9O_(14)和CsB_3O_5在非中心对称的空间群中结晶,从而导致非线性光学特性,对此已经进行了研究。

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