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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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