Sinoite (Si2N2O) shocked at pressures of 28 to 64 GPa
Sinoite (Si2N2O) shocked at pressures of 28 to 64 GPa
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DOI：
10.2138/am.2006.2106
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发表时间：
2006-02
影响因子：
3.1
通讯作者：
T. Sekine;Hongliang He;Takamichi Kobayashi;K. Shibata
中科院分区：
文献类型：
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作者：
T. Sekine;Hongliang He;Takamichi Kobayashi;K. Shibata
在28-64 Gpa压力范围内进行了华硅钙石（Si_2N_2O）的冲击恢复实验。冲击后的样品进行了研究，通过光学显微镜，X射线衍射，显微拉曼光谱，透射电子显微镜结合能量色散X射线分析。Sinoite是稳定的~28 Gpa，在34 Gpa部分无定形，几乎完全无定形以上41 Gpa。这些结果是一致的观察，sinoite被发现在顽火辉石类岩石分类到冲击阶段S2，并暗示sinoite可能不是一个结晶的产品从冲击熔体，它可能是一个变质的产品的高温和相对较低的压力。
Abstract Shock recovery experiments of sinoite (Si2N2O) were carried out in a pressure range of 28-64 Gpa. Post-shock samples were investigated by optical microscopy, X-ray diffraction, micro Raman spectroscopy, and transmission electron microscopy coupled with energy dispersive X-ray analysis. Sinoite was stable up to ~28 Gpa, being partially amorphous at 34 Gpa, and almost completely amorphized above 41 Gpa. These results are consistent with the observation that sinoite is found in enstatite chondrites classified into shock stage S2, and imply that sinoite may not be a crystallization product from impact melts and that it may be a metamorphic product of high temperatures and relatively low pressure.