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
	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 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).
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/42920512-1/10597
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.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[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 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.

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