High-pressure synthesis and thermal expansivity investigation of carbonate solid solutions Mg_(1-x)Mn_xCO_3
文献类型：期刊论文
| ; | |
| 作者 | RUI LI; WEN LIANG; HANQI HE; YONG MENG; HONGFENG TANG |
| 刊名 | High temperatures-high pressures
 ; High temperatures-high pressures
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| 出版日期 | 2019 ; 2019 |
| 卷号 | 48期号:4页码:367-380 |
| 关键词 | Carbonate Solid Solution Mg1-xmnxco3 Carbonate Solid Solution Mg1-xmnxco3 high-temperature Xrd thermal Expansion Coefficient high-temperature Xrd thermal Expansion Coefficient |
| 英文摘要 | 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 degrees 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 (alpha(a) and alpha(c)) and the volumetric thermal expansion coefficient alpha(V) for Mg1-xMnxCO3 were quantified as alpha(a) = 7.41 x 10(-6)/degrees C, alpha(c) = 2.37 x 10(-5)/degrees C and alpha(V) = 3.86 x 10(-5)/degrees C for x = 0.0; alpha(a) = 6.67 x 10(-6)/degrees C, alpha(c) = 2.31 x 10(-5)/degrees C and alpha(V) = 3.67 x 10(-5)/degrees C for x = 0.1; alpha(a) = 6.16 x 10(-6)/degrees C, alpha(c) = 2.35 x 10(-5)/degrees C and alpha(V) = 3.59 x 10(-5)/degrees C for x = 0.3; alpha(a) = 5.91 x 10(-6)/degrees C, alpha(c) = 2.40 x 10(-5)/degrees C and alpha(V) = 3.58 x 10(-5)/degrees C for x = 0.5; alpha(a) = 5.47 x 10(-6)/degrees C, alpha(c) = 2.53 x 10(-5)/degrees C and alpha(V) = 3.61 x 10(-5)/degrees C for x = 0.7; alpha(a) = 4.76 x 10(-6)/degrees C, alpha(c)= 2.55 x 10(-5)/degrees C and alpha(V) = 3.52 x 10(-5)/degrees C for x = 0.9; alpha(a) = 4.18 x 10(-6)/degrees C, alpha(c) = 2.50 x 10(-5)/degrees C and alpha(V) = 3.35 x 10(-5)/degrees C for x = 1.0. The thermal expansion coefficients (alpha(a), alpha(c), and alpha(V)) can be fitted with a symmetric cubic function of the Mn2+ content as alpha(a) = 7.34 x 10(-6)-7.06 x 10(-6)x + 1.21 x 10(-5)x(2)-8.19 x 10(-6)x(3); alpha(c) = 2.37 x 10(-6)-7.94 x 10(-6)x + 2.57 x 10(-5)x(2) - 1.64 x 10(-5)x(3); alpha(V) = 3.85 x 10(-5) - 2.08 x 10(-5)x + 4.59 x 10(-5)x(2) - 3.01 x 10(-5)x(3). ;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 degrees 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 (alpha(a) and alpha(c)) and the volumetric thermal expansion coefficient alpha(V) for Mg1-xMnxCO3 were quantified as alpha(a) = 7.41 x 10(-6)/degrees C, alpha(c) = 2.37 x 10(-5)/degrees C and alpha(V) = 3.86 x 10(-5)/degrees C for x = 0.0; alpha(a) = 6.67 x 10(-6)/degrees C, alpha(c) = 2.31 x 10(-5)/degrees C and alpha(V) = 3.67 x 10(-5)/degrees C for x = 0.1; alpha(a) = 6.16 x 10(-6)/degrees C, alpha(c) = 2.35 x 10(-5)/degrees C and alpha(V) = 3.59 x 10(-5)/degrees C for x = 0.3; alpha(a) = 5.91 x 10(-6)/degrees C, alpha(c) = 2.40 x 10(-5)/degrees C and alpha(V) = 3.58 x 10(-5)/degrees C for x = 0.5; alpha(a) = 5.47 x 10(-6)/degrees C, alpha(c) = 2.53 x 10(-5)/degrees C and alpha(V) = 3.61 x 10(-5)/degrees C for x = 0.7; alpha(a) = 4.76 x 10(-6)/degrees C, alpha(c)= 2.55 x 10(-5)/degrees C and alpha(V) = 3.52 x 10(-5)/degrees C for x = 0.9; alpha(a) = 4.18 x 10(-6)/degrees C, alpha(c) = 2.50 x 10(-5)/degrees C and alpha(V) = 3.35 x 10(-5)/degrees C for x = 1.0. The thermal expansion coefficients (alpha(a), alpha(c), and alpha(V)) can be fitted with a symmetric cubic function of the Mn2+ content as alpha(a) = 7.34 x 10(-6)-7.06 x 10(-6)x + 1.21 x 10(-5)x(2)-8.19 x 10(-6)x(3); alpha(c) = 2.37 x 10(-6)-7.94 x 10(-6)x + 2.57 x 10(-5)x(2) - 1.64 x 10(-5)x(3); alpha(V) = 3.85 x 10(-5) - 2.08 x 10(-5)x + 4.59 x 10(-5)x(2) - 3.01 x 10(-5)x(3). |
| 语种 | 英语 ; 英语 |
| 源URL | [http://ir.gyig.ac.cn/handle/42920512-1/10597]  |
| 专题 | 地球化学研究所_地球内部物质高温高压实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Key Lab High Temp & High Pressure Study Earths In, Guiyang 550081, Guizhou, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R 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 Mg_(1-x)Mn_xCO_3, High-pressure synthesis and thermal expansivity investigation of carbonate solid solutions Mg_(1-x)Mn_xCO_3[J]. High temperatures-high pressures, High temperatures-high pressures,2019, 2019,48, 48(4):367-380, 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 Mg_(1-x)Mn_xCO_3.High temperatures-high pressures,48(4),367-380. |
| MLA | RUI LI,et al."High-pressure synthesis and thermal expansivity investigation of carbonate solid solutions Mg_(1-x)Mn_xCO_3".High temperatures-high pressures 48.4(2019):367-380. |
入库方式： OAI收割
来源：地球化学研究所
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