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本工作采用模拟合成盐卤硼酸盐的方法,配合多种物理分析法进行物相鉴定,确认浓盐卤析出硼酸盐固相是由两种硼酸盐组成。其中一种硼酸盐的化学式为MgO·3B_2O_3·7H_2O,另一种是未见报导的新硼酸盐,化学式为2MgO·2B_2O_3·MgCl_2·14H_2O。这种含氯化镁的硼酸镁水合复盐的晶粒细小,电镜下呈针柱状,我们给出了它的伦琴射线粉晶衍射数据,红外光谱和热重分析结果,在差示热分析曲线上出现两个明显的晶型转变放热峰,与柱硼镁石(MgO·B_2O_3·3H_2O)的差示热分析曲线类似。
In this work, the method of simulating synthetic salt haloformate was adopted to identify the phase with a variety of physical analysis methods. It was confirmed that the solid salt of brine produced by concentrated salt brine consisted of two borates. One of the borates has the chemical formula MgO 3B 3 O 3 7H 2 O and the other one is the new borate which has not been reported. The chemical formula is 2MgO · 2B 2 O 3 · MgCl 2 · 14H 2 O. This magnesium chloride-bearing magnesium borate hydrate double-crystal has a fine grain size and a needle-like shape under electron microscopy. We present its x-ray powder diffraction data, infrared spectrum and thermogravimetric analysis, which appear on the differential thermal analysis curve The two obvious exothermic peaks of the crystal transition are similar to the differential thermal analysis curves of plexite (MgO · B 2 O 3 · 3H 2 O).