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High-pressure synthesis and thermal expansivity investigation of carbonate solid solutions Mg1-xMnxCO3 | |
Rui Li; Wen Liang; Hanqi He; Yong Meng; HongFeng Tang | |
2019 | |
发表期刊 | High Temperatures-High Pressures |
卷号 | 48期号:4页码:367-380 |
摘要 | Using synthesized MgCO3 and reagent-grade MnCO3 as starting materials, a series of Mg1-xMnxCO3 carbonate solid solutions were synthesized by a simple solid reaction under high-temperature-pressure conditions of 3 GPa and 800°C for 4 h. The phase compositions of as-synthesized Mg1-xMnxCO3 samples were investigated by powder X-ray diffraction (XRD); no impurities were observed. The lattice parameters were refined and showed a linear relationship as a function of the Mn2+ content, which is expected to be in accordance with the ideal solution model. Based on this, high- temperature XRD measurements were carried out to further study the thermal expansivity of Mg1-xMnxCO3. The axis thermal expansion coefficients (αa and αc) and the volumetric thermal expansion coefficient αV for Mg1-xMnxCO3 were quantified as αa =7.41×10-6/°C, αc=2.37×10-5/°C and αV=3.86×10-5/°C for x=0.0; αa =6.67×10-6/°C, αc=2.31×10-5/°C and αV=3.67×10-5/°C for x=0.1; αa=6.61×10-6/°C, αc=2.35×10-5/°C and αV=3.59×10-5/°C for x=0.3; αa=5.91×10-6/°C, αc=2.40×10-5/°C and αV=3.58×10-5/°C for x=0.5; αa=5.47×10-6/°C, αc=2.53×10-5/°C and αV=3.61×10-5/°C for x=0.7; αa=4.76×10-6/°C, αc=2.55×10-5/°C and αV=3.52×10-5/°C for x=0.9; αa=4.18×10-6/°C, αc=2.50×10-5/°C and αV=3.35×10-5/°C for x=0.3. The thermal expansion coefficients (αa, αc and αV) can be fitted with a symmetric cubic function of the Mn2+ content as αa=7.34×10-6 -7.06×10-6x+1.21×10-5x2-8.19×10-6x3; αc=2.37×10-6-7.94×10-6x+2.57×10-5x2-1.64×105x3; αV=3.85×10-5-2.08×10-5x+4.59×10-5x2-3.01×10-5x3. |
关键词 | Carbonate Solid Solution Mg1-xmnxco3 High-temperature Xrd Thermal Expansion Coefficient |
收录类别 | SCI |
语种 | 英语 |
文献类型 | 期刊论文 |
条目标识符 | http://ir.gyig.ac.cn/handle/42920512-1/10491 |
专题 | 地球内部物质高温高压实验室 矿床地球化学国家重点实验室 地球深部物质与流体作用地球化学研究室 |
作者单位 | 1.Key Laboratory of High temperature and High pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China 2.University of Chinese Academy of Sciences, Beijing, 100049, China 3.State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550081, China |
推荐引用方式 GB/T 7714 | Rui Li,Wen Liang,Hanqi He,et al. High-pressure synthesis and thermal expansivity investigation of carbonate solid solutions Mg1-xMnxCO3[J]. High Temperatures-High Pressures,2019,48(4):367-380. |
APA | Rui Li,Wen Liang,Hanqi He,Yong Meng,&HongFeng Tang.(2019).High-pressure synthesis and thermal expansivity investigation of carbonate solid solutions Mg1-xMnxCO3.High Temperatures-High Pressures,48(4),367-380. |
MLA | Rui Li,et al."High-pressure synthesis and thermal expansivity investigation of carbonate solid solutions Mg1-xMnxCO3".High Temperatures-High Pressures 48.4(2019):367-380. |
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