Record details

Title
    Rietveld refined of the crystal structure of silica phases from the Barringer Crater in Arizona
Statement of responsibility
    Roman Skála
Other titles
    Rietveldovské zpřesnění krystalové struktury fází SiO2 z Barringerova kráteru v Arizoně
    Sborník referátů 7.konference o vltavínech - Znojmo 1996 (Variant.)
Author
    Skála, Roman
Language
    anglicky
Source title - serial
    Přírodovědný sborník Západomoravského muzea v Třebíči
Vol./nr.
    Vol. 31
Pages
    p. 37-44
Year
    1997
Notes
    16 bibl.
Subject group
    coesit
    impaktit
    kráter impaktní
    krystalová struktura
    křemen
    metamorfóza šoková
    oxid křemičitý
    zpřesňování struktury
Geographical name
    USA-Arizona
Keyword
    Arizona
    Barringer
    Crater
    Crystal
    Phases
    Refined
    Rietveld
    Silica
    Structure
Abstract (in english)
   The Barringer (or Meteor) Crater lying in the plains of northern Arizona between towns Flagstaff and Winslow is the first terrestrial crater where the impact origin of the bowl-shaped structure was accepted due mainly to association of the crater numerous pieces of meteoritic iron found in both the crater and adjacent areas. Sedimentary lithologies subjected to shock metamorphism in the Barringer crater are generally rich in silica, so this crater is also the first place over the world where natural occurence of hyperbaric silica phases (i.e. coesite and stishovite) was encountered. The present study shows the use of the Rietveld method for the refinement of crystal structure of quartz, coesite and stishovite recovered from the Barringer crater.
   All structure are mutually compared and differences in quartz crystal structures from heavily shocked Coconino sandstone from the center of the crater and stratigraphically equivalent material from the crater rim are discussed in terms of distortion coefficient
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    6. 3. 2008
Import date
    8. 8. 2012