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phase chemistry of the Complexes of RE Amino Acids

Journal of Rare Earths 2002年第1期20卷 1-9页

作者：高胜利陈三平李焕勇 Yang Xuwu杨旭武史启祯 Department of chemistry Shaanxi Key Laboratory of Physico-Inorganic Chemistry Northwest University Xi′an 710069 China

Forty three phase diagrams of ternary system concerning rare earth salts, α amino acids and water, which were constructed by phase equilibrium methods, were expounded. The influences of the factors such as cations, anions, the structure of amino acids, temperature on the phase diagrams were discussed. Under the guidance of phase equilibrium results, over 150 new solid complexes were prepared. IR, reflecting, UV, FS, and Raman spectra for these complexes were investigated and the regularity of 'tripartite effect', 'tetrad effect', 'Nephelanxetic effect', 'Oddo Harkins' was observed. Thermal decomposition processes of the complexes were confirmed. Based on the comparison with the known crystal structures of rare earth amino acid complexes, an estimation method for predicting the crystal structure data of series complexes was founded. The constant volume combustion energies of the complexes were determined by RBC 1 type rotating bomb calorimeter. The standard enthalpies of combustion and standard enthalpies of formation were calculated for these complexes.

关键词： Key word: rare earths amino acids phase chemistry thermochemistry

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Application of DSC in the Fields of phase chemistry

Application of DSC in the Fields of Phase Chemistry

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第十六届全国化学热力学和热分析学术会议

作者： Xue-Lu Li~1,Ya-Fei Guo~1,Shi-Qiang Wang~1 and Tian-Long Deng~(1,2) 1 Tianjin Key Laboratory of Marine Resources and chemistry,College of Marine Science and Engineering, Tianjin University of Science and Technology Tianjin,300457,PRC 2 ACS Key Laboratory of Salt Lake Resources and chemistry,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,PRC

Differential scanning calorimetry(DSC) is a technology to measure the variation of energy difference between test sample and reference materials with temperature *** the programmed temperature control,it can record th... 详细信息

关键词： DSC phase chemistry phase diagram eutectic system

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Progresses on phase chemistry of Aqueous Borate Systems at Low Temperature

Progresses on Phase Chemistry of Aqueous Borate Systems at L...

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第十六届全国化学热力学和热分析学术会议

作者： Li-Juan Yang~1,Dong-Liang Shen~1,Ya-Fei Guo~1,Shi-Qiang Wang~1,Tian-Long Deng~(1,2) 1 Tianjin Key Laboratory of Marine Resources and chemistry,College of Marine Science and Engineering, Tianjin University of Science and Technology Tianjin,300457,PRC 2 ACS Key Laboratory of Salt Lake Resources and chemistry,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,PRC

＜正＞Boron and its compounds as vital chemical raw materials are widely used in glass,metallurgy, enamel,agriculture field and daily chemical department,and so on Boron mineral resources exist either with solid boron ores in the northeast of China or liquid boron-containing salt lake brines in the Qinghai-Tibet plateau in *** boron minerals as well as magnesium borate type of

关键词： phase chemistry phase diagram solubility low temperature

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