矿物药胆矾的物相与热性能分析

Study on composition and thermal character of mineral traditional Chinese medicine chalcanthite

目的:确定矿物药胆矾的物相及加热脱水过程。方法:采用 X 射线粉末衍射及原位高温装置结合热重分析等测试手段。结果:矿物中药胆矾的主要物相是 CuSO_4·5H_2O。X 射线高温原位实验和热重分析实验证明矿物药胆矾(CuSO_4·5H_2O)加热到58.92℃时失去2分子结晶水形成 CuSO_4·3H_2O,继续加热到102.26℃时再失去2分子结晶水形成 CuSO_4·H_2O,最后在198.79℃时失去全部结晶水,成为白色无水粉末 CuSO_4。结论:矿物药胆矾的主要物相是 CuSO_4·5H_2O,其中5个结晶水在加热过程中的失水顺序是2,2,1。

Objective ： To determine the phase composition and thermal character of the mineral traditional Chinese medicine chaleanthite. Methods： X - ray powder diffraction with in - situ high temperature attachment and Themlo- gravimetric analysis instruments were applied to analyze the chalcanthite. Results：The main phase composition of ehaleanthite is CuSO4 · 5H2O. The results were proved by XRD and TG that is when chalcanthite is heated to 58.92 ℃, two molecular water was first lost and changed into CuSO4 · 3H2O, when heated to 102. 26 ℃, another two molecular water lost and changed into CuSO4 · H2O, when heated to 198.79 ℃, the last one molecular water lost and became white powder CuSO4. Conclusion：the chalcanthite＇s main phase composition is CuSO4 · 5H2O. The order of losing water molecular of CuSO4 · 5H2O is 2,2,1.