| Formation Process and Thermodynamic Poperties of Calcite |
| |
| 作者姓名： | 南照东 史作义 秦梅 侯万国 谭志诚 |
| |
| 作者单位： | [1]College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China [2]Department of Chemistry, Qufu Normal University, Qufu, Shandong 273165, China [3]Key Laboratory of Colloid and Interface Chemistry of the State Education Ministry, Shandong University, Jinan, Shandong 250100, China [4]Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China |
| |
| 基金项目： | Project supported by the National Natural Science Foundation of China （No. 20073047） and Doctor Foundation of Shandong Province （No. 2004BS04021）. |
| |
| 摘 要： | The fast mixing of aqueous solutions of calcium chloride and sodium carbonate resulted in crystalline forms of vaterite and calcite under vigorous stirring. Then, the vaterite was transformed to pure calcite within about 180 rain. The crystalline forms all grew with experimental time increase. Scanning electron microscopy （SEM）, Fourier transform infrared spectroscopy （FT-IR）, and X-ray diffraction spectroscopy （XRD） techniques were employed to characterize the as-prepared samples. The heat capacity of the stable as-synthesized calcite was determined by means of an adiabatic calorimeter from 80 to 390 K. The thermodynamic functions of the calcite were derived based on the relationships among the thermodynamic functions and the function of the measured heat capacity with respect to temperature.
|
| 关 键 词： | 方解石 生成过程 热力学性质 碳酸钙 |
| 修稿时间： | 2006-10-082006-12-21 |
Formation Process and Thermodynamic Poperties of Calcite |
| |
| NAN, Zhao-Dong SHI, Zuo-yi QIN, Meib HOU, Wan-Guo TAN, Zhi-Cheng.Formation Process and Thermodynamic Poperties of Calcite[J].Chinese Journal of Chemistry,2007,25(5):592-595. |
| |
| Authors: | NAN Zhao-Dong SHI Zuo-yi QIN Meib HOU Wan-Guo TAN Zhi-Cheng |
| |
| Institution: | a College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225002, China b Department of Chemistry, Qufu Normal University, Qufu, Shandong 273165, China c Key Laboratory of Colloid and Interface Chemistry of the State Education Ministry, Shandong University, d Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, Liaoning 116023, China |
| |
| Abstract: | The fast mixing of aqueous solutions of calcium chloride and sodium carbonate resulted in crystalline forms of vaterite and calcite under vigorous stirring. Then, the vaterite was transformed to pure calcite within about 180 min. The crystalline forms all grew with experimental time increase. Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT‐IR), and X‐ray diffraction spectroscopy (XRD) techniques were employed to characterize the as‐prepared samples. The heat capacity of the stable as‐synthesized calcite was determined by means of an adiabatic calorimeter from 80 to 390 K. The thermodynamic functions of the calcite were derived based on the relationships among the thermodynamic functions and the function of the measured heat capacity with respect to temperature. |
| |
| Keywords: | calcite vaterite crystalline form heat capacity |
| 本文献已被 维普 等数据库收录！ |
|
