Fe2N-type SiO2 from shocked quartz

Details Fe2N-type SiO2 from shocked quartz Fe2N-type SiO2 from shocked quartz

Feb 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51..379s&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 51, Feb. 1987, p. 379-381.

Computer Science

5

Crystal Lattices, Geology, Phase Transformations, Quartz, Shock Loads, Silicon Dioxide, Electron Diffraction, Geochemistry, Meteorite Collisions, Stishovite, X Ray Diffraction

Scientific paper

The modified niccolite structure (Fe2N-type) of SiO2, previously found in diamond anvil experiments at 35 to 40 GPa, was formed in a porous mixture of crystalline alpha-quartz and copper powder at shock pressures estimated at 12 to 27 GPa. It is suggested that quartz can invert during shock compression not only to coesite, stishovite and an amorphous or glass phase of silica, but also to Fe2N-type SiO2, depending upon the shock history.

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