In situ observation of the decomposition of kyanite at high pressures and high temperatures
In situ observation of the decomposition of kyanite at high pressures and high temperatures
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DOI：
10.2138/am.2007.2492
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发表时间：
2007-10
影响因子：
3.1
通讯作者：
S. Ono;Y. Nakajima;K. Funakoshi
中科院分区：
文献类型：
--
作者：
S. Ono;Y. Nakajima;K. Funakoshi
在多砧高压装置上，利用同步辐射对蓝晶石Al_2SiO_5的分解过程进行了原位观察，观察到蓝晶石在高温高压下发生了由蓝晶石到硅镁石+Al_2SiO_5的相变。在T = 1200-1900 K和P = 5-15 GPa下，该分解的相界为P（GPa）= 10.2 + 0.0016 × T（K）。以前的研究使用淬火方法显示的差异，在转变压力的分解。我们的研究结果使用原位观测解决了这一争议。
Abstract In situ observations of the decomposition of kyanite, Al2SiO5, were carried out in a multi-anvil high-pressure apparatus using synchrotron radiation, where the phase change from kyanite to stishovite + corundum was observed at high pressures and high temperatures. The phase boundary of this decomposition at T = 1200-1900 K and P = 5-15 GPa was determined to be, P (GPa) = 10.2 + 0.0016 × T (K). Previous studies using the quench method showed a discrepancy in the transition pressure of the decomposition. Our results using in-situ observations resolve this dispute.