2016 Fiscal Year Final Research Report
Crystal growth of minerals as an indicator of climatic and environmental changes at lower and higher temperatures: In situ hot/cool stage AFM study at a nano level
| Project/Area Number |
26400518
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Petrology/Mineralogy/Economic geology
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Keywords | AFM / 結晶成長 / 溶解 / 硫酸塩鉱物 / 炭酸塩鉱物 |
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| Outline of Final Research Achievements |
We examined the growth (and/or dissolution) behaviors of sulfate and carbonate minerals using in situ new hot/cool-stage AFM, to better understand for the microscopic growth and dissolution mechanisms and kinetics of the minerals in solutions at various temperatures (especially under room temperature). The kinetic laws of the crystal growth on the barite (001) surface differed among crystallographic directions and crystal growth mechanisms. Two critical supersaturation points corresponding to the changes in main crystal growth mechanisms from the spiral growth, via 2D nucleation, to adhesive growth tended to decrease with decreasing of solution temperature. On the calcite (10-14) surface, the advance rates of the steps during the growth tended to be faster than the retreat rates of those during the dissolution, while the growth rates of growth spirals toward the direction perpendicular to the (10-14) plane were slower than the retreat rates of (10-14) plane in etch pits.
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| Free Research Field |
鉱物学、環境鉱物学
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