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Tomioka et al. 2000
Tomioka, N., Mori, H. and Fujino, K. (2000). Shock-induced transition of NaAlSi3O8 feldspar into a hollandite structure in a L6 chondrite. Geophysical Research Letters 27: doi: 10.1029/2000GL008513. issn: 0094-8276.

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. ¿ 2000 American Geophysical Union

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Abstract

Keywords
Mineralogy and Petrology, Meteorites, Mineral Physics, High-pressure behavior, Mineral Physics, X ray, neutron, and electron spectroscopy and diffraction
Journal
Geophysical Research Letters
http://www.agu.org/journals/gl/
Publisher
American Geophysical Union
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