镁橄榄石和顽辉石的高温高压合成

Gaoya Wuli Xuebao/Chinese Journal of High Pressure Physics(2006)

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Abstract
用国产六面顶压机,在温度为1 000~1 500℃和压力为2~5GPa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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Key words
High temperature and high pressure,Mg2 SiO4,MgO,MgSiO3,SiO2
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