Physics
Scientific paper
Dec 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000georl..27.3997t&link_type=abstract
Geophysical Research Letters, Volume 27, Issue 24, p. 3997-4000
Physics
8
Mineralogy And Petrology: Meteorites, Mineralogy And Petrology: Planetary Mineralogy And Petrology, Mineral Physics: High-Pressure Behavior, Mineral Physics: X Ray, Neutron, And Electron Spectroscopy And Diffraction
Scientific paper
Natural NaAlSi3O8 hollandite was found in the Tenham chondrite. It occurs as aggregates of extremely fine grains of several tens of nanometers. The hollandite phase seems to have formed from host feldspar in a solid-state reaction during the shock event. It is very sensitive to electron beam irradiation and easily becomes amorphous, similar to MgSiO3 perovskite contained in the same chondrite. The existence of crystalline silicate perovskite and hollandite in Tenham indicates that the peak pressure and the post-shock temperature were much lower than previously believed.
Fujino Kiyoshi
Mori Hiroshi
Tomioka Naotaka
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