Pressure-induced amorphization of minerals; a review
Pressure-induced amorphization of minerals; a review
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DOI：
10.1127/ejm/9/5/0907
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发表时间：
1997-10
影响因子：
2.1
通讯作者：
P. Richet;P. Gillet
中科院分区：
文献类型：
--
作者：
P. Richet;P. Gillet
当静态压缩到几十GPa时，各种矿物转变为无定形材料。以石英和GeO2和A1PO4的石英型形式为例，压力诱导的非晶化首先参照差应力、结晶转变、压缩机制和剪切过程来描述。其他矿物的非晶化信息不太全面，但骨架硅酸盐、辉石、橄榄石和含水硅酸盐仍观察到类似的特征。然后回顾了通过冷却液体、静态压缩或减压晶体、在1个大气压下适度加热高压矿物和冲击波获得的无定形物质之间的差异和相似之处。最后，非晶化的热力学进行了讨论，提出了非晶化的机制解释，特别是弹性和动态不稳定性和剪切过程。关键词：非晶化，高压转变，致密玻璃，透晶玻璃。
A variety of minerals transform to an amorphous material when statically compressed to a few tens of GPa. With quartz and the quartz-type forms of GeO2 and A1PO4 as examples, pressure-induced amorphization is first described with reference to differential stresses, crystalline transformations, compression mechanisms and shearing processes. Less comprehensive information is available for the amorphization of other minerals, but similar features are nevertheless observed for framework silicates, pyroxenes, olivines and hydrous silicates. The differences and similarities between amorphous substances obtained by cooling of liquids, static compression or decompression of crystals, moderate heating of high-pressure minerals at 1 atm, and shock waves are then reviewed. Finally, the thermodynamics of amorphization is discussed and the mechanistic interpretations of amorphization are presented, with special reference to elastic and dynamic instabilities and shearing processes. Key-words: amorphization, high-pressure transformations, densified glasses, diaplectic glasses.