| 镁橄榄石和顽辉石的高温高压合成 |
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| 引用本文： | 杜勇慧,张铁臣,苏作鹏,崔启良. 镁橄榄石和顽辉石的高温高压合成[J]. 高压物理学报, 2006, 20(3): 281-284 |
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| 作者姓名： | 杜勇慧 张铁臣 苏作鹏 崔启良 |
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| 作者单位： | 吉林大学超硬材料国家重点实验室,吉林长春,130012;吉林大学超硬材料国家重点实验室,吉林长春,130012;吉林大学超硬材料国家重点实验室,吉林长春,130012;吉林大学超硬材料国家重点实验室,吉林长春,130012 |
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| 基金项目： | 国家自然科学基金资助项目(10299040) |
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| 摘 要： | 用国产六面顶压机，在温度为1 000～1 500 ℃和压力为2～5 GPa的高温高压条件下，对氧化镁（MgO）和二氧化硅（SiO2）混合粉末样品进行了处理。通过对所得产物的观察与X射线衍射分析结果表明，在较宽的压力范围内，可以得到镁橄榄石（Mg2SiO4）单晶体和顽辉石（MgSiO3）单晶体。讨论了地幔物质镁橄榄石（Mg2SiO4）和顽辉石（MgSiO3）的生成条件、生长特性及相变关系。
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| 关 键 词： | 二氧化硅 氧化镁 镁橄榄石 顽辉石 高温高压 |
| 文章编号： | 1000-5773（2006）03-0281-04 |
| 收稿时间： | 2005-10-09 |
| 修稿时间： | 2006-05-21 |
Olivine and Pyroxene Syntheses under High Temperature and High Pressure |
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| DU Yong-Hui,ZHANG Tie-Chen,SU Zuo-Peng,CUI Qi-Liang. Olivine and Pyroxene Syntheses under High Temperature and High Pressure[J]. Chinese Journal of High Pressure Physics, 2006, 20(3): 281-284 |
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| Authors: | DU Yong-Hui ZHANG Tie-Chen SU Zuo-Peng CUI Qi-Liang |
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| Affiliation: | (National Laboratory of Su perhard Materials , Jilin University , Chang chun 130012,China |
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| Abstract: | Olivine (Mg2SiO4) and pyroxene (MgSiO3) single crystals were synthesized under high temperature (1 000~1 500 ℃) and high pressure (2~5 GPa) using the mixed powder of magnesium oxide (MgO) and silicon dioxide (SiO2) as starting materials. Results by TEM and XRD tests showed that the products increased with the temperature rising or the pressure decreasing. Meanwhile, phase transition relationship existed between Mg2SiO4 and MgSiO3 in this p-T ranges, and the mixed phase of Mg2SiO4-MgSiO3 would turn into the single phase of MgSiO3 at given pressure and temperature. The growth condition and character of Mg2SiO4 and MgSiO3 as well as phase transition relationship between Mg2SiO4 and MgSiO3 were discussed respectively. |
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| Keywords: | SiO_2 MgO Mg_2SiO_4 MgSiO_3 high temperature and high pressure |
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