PHASE TRANSFORMATIONS IN DEPTHS OF THE EARTH: A HYPOTHESIS

A new modification of silicon dioxide with a density of 4.35, and a hexagonal coordination of Si, was produced in the laboratory at 115 to 145 kilobars pressure and about 1500 degrees C, i.e., under conditions resembling the environment of the "C" zone of the Earth's mantle. This previously unknown SiO2 mineral resembles the rutile-structured variety of SiO2 discovered by Americans in the crater of the Arizona meteorite. These discoveries are in harmony with the modern tentative view of geophysicists who regard the "C" zone as the zone of transitions or conversions of silicon oxide structures, from the still higher coordination of Si in the "D" zone to the tetrahedral one in "B" and "A".

  • Corporate Authors:

    American Geological Institute

    2201 M Street, NW
    Washington, DC  United States  20037
  • Authors:
    • Stishov, S M
  • Publication Date: 1964-3

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Filing Info

  • Accession Number: 00264476
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 16 1975 12:00AM