熔点矿物-地球科学堆栈交换江南电子竞技平台江南体育网页版

熔点的矿物质

2018 - 05 - 19 - t23:41:01z

看这个网站,我可以看到的熔点以下矿物质:< a href = " http://hyperphysics.phy-astr.gsu.edu/hbase/Geophys/meltrock.html " rel = " nofollow noreferrer " > http://hyperphysics.phy-astr.gsu.edu/hbase/Geophys/meltrock.html < / > 显然在温度为1200°C,所有的矿物存在于熔融状态。但是,看的熔点< a href = " https://en.wikipedia.org/wiki/Quartz " rel = " nofollow noreferrer " >石英< / >在维基百科上我发现熔点接近1700°C。这是怎么回事?

It can’t be an effect of the pressure. In the interior, the pressure will be higher and thus further increase the melting point.

答案由Gimelist熔点的矿物质

2018 - 05 - 20 - t11:36:45z

从这个高度相关的问题我的回答: < a href = " //www.hoelymoley.com/a/2742/725 " > //www.hoelymoley.com/a/2742/725 < / > <人力资源> 的熔点矿物隔离,或高于纯物质混合物的矿物质。例如,(混合)石英和辉石的混合物会融化在较低的温度比纯石英或纯辉石。确切的温度取决于比例。

In general, the more different kind of components (i.e. "things": minerals, elements, molecules, etc) you add to a mixture, the lower the melting point of the mixture as a whole.

For example, sea water melts at -2 °C because it's a mixture of water (melts at 0 °C) and all kinds of salts. Steel melts at a lower temperature than pure iron because it's a mixture of iron and carbon.

回答的灰熔点的矿物质

2018 - 05 - 20 - t14:45:21z

共晶熔点最低的混合材料,如钠钙玻璃制成的氢氧化钠、氧化钙、二氧化硅。混合物,在适当的比例,降低了石英砂的熔点(二氧化硅)从1700年到1000摄氏度。在地幔混合复杂得多,但如果我记得地球化学铝、铁、镁、钙的主要元素,降低纯硅的熔点在岩浆融化。水是非常重要的,因为它不仅降低了饱和岩石的熔点也携带热量低的温度下熔化材料,尤其是在俯冲带。