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单词 stishovite
释义
stishovite

Astronomy
  • A rare mineral that is produced when a particularly high-pressure shock wave meteorite impact passes through rock containing quartz. It is a high-density form of silica produced at a pressure of 130 000 bar. Stishovite-bearing fragments in the vicinity of large craters are taken as evidence that the crater is of meteoritic origin. It is named after the Russian mineralogist Sergei Mikhailovich Stishov (1937– ) who helped synthesize it in 1962. See also coesite.


Geology and Earth Sciences
  • A high-density form of crystalline silica (see also quartz) with the same formula SiO2, but formed at pressures greater than 10 GPa; discovered at some meteorite impact sites, but rarely in terrestrial rocks; sp.gr. 4.3; minerals possessing a similar atomic lattice may exist in the Earth’s upper mantle.


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