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Characterization of a high-pressure phase of silica from the Martian meteorite Shergotty

  • Przemyslaw Dera EMAIL logo , Charles T. Prewitt , Nabil Z. Boctor and Russell J. Hemley
Published/Copyright: March 28, 2015
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American Mineralogist
From the journal American Mineralogist Volume 87 Issue 7

Abstract

Recently, there has been substantial interest in post-stishovite high-pressure polymorphs of SiO2, discovered as extraterrestrial minerals, or synthesized in the laboratory. Previous investigators reported the presence of “α-PbO2-like” and “baddeleyite-like” SiO2 in the Martian meteorite Shergotty, and also the synthesis of an a-PbO2-like phase at pressures of 60-80 GPa in a laser-heated diamond anvil cell. To provide definitive information about the nature of the natural “a-PbO2 phase,” we recovered a small sample from the Shergotty meteorite, obtained powder X-ray diffraction patterns, and performed a Rietveld refinement of the structure. The resulting cell parameters and space group are a = 4.097(1) Å, b = 5.0462(9) Å, c = 4.4946(8) Å, and Pbcn. The structure refinement confirms that this sample does have the α-PbO2 structure

Received: 2002-1-15
Accepted: 2002-4-19
Published Online: 2015-3-28
Published in Print: 2002-7-1

© 2015 by Walter de Gruyter Berlin/Boston

Articles in the same Issue

  1. Thermal equations of state for B1 and B2 KCl
  2. Determination of molar absorptivities for infrared absorption bands of H2O in andesitic glasses
  3. H2O activity in H2O-N2 fluids at high pressure and temperature measured by the brucitepericlase equilibrium
  4. Kinetics of iron oxidation-reduction in hydrous silicic melts
  5. Kinetics of cation ordering in synthetic MgAl2O4 spinel
  6. Structural properties and heat-induced oxidation-dehydrogenation of manganoan ilvaite from Perda Niedda mine, Sardinia, Italy
  7. Ultrahigh-pressure metamorphism in western Tianshan, China: Part I. Evidence from inclusions of coesite pseudomorphs in garnet and from quartz exsolution lamellae in omphacite in eclogites
  8. Ultra-high pressure metamorphism in western Tianshan, China: Part II. Evidence from magnesite in eclogite
  9. Discovery of clinoenstatite in garnet pyroxenites from the Dabie-Sulu ultrahigh-pressure terrane, east-central China
  10. Ultrahigh-pressure (UHP) low-Al titanites from carbonate-bearing rocks in Dabieshan- Sulu UHP terrane, eastern China
  11. Metamictization and recrystallization of titanite: An infrared spectroscopic study
  12. Fine structure of infrared OH-stretching bands in natural and heat-treated amphiboles of the tremolite-ferro-actinolite series
  13. Correlation between OH concentration and oxygen isotope diffusion rate in diopsides from the Adirondack Mountains, New York
  14. The substitution Fe3+-Al and the isosymmetric displacive phase transition in synthetic zoisite: A powder X-ray and infrared spectroscopy study
  15. In situ X-ray observation of the reaction dolomite = aragonite + magnesite at 900–1300 K
  16. High-pressure single-crystal X-ray and powder neutron study of F,OH/OD-chondrodite: Compressibility, structure, and hydrogen bonding
  17. Quantitative characterization of biotic iron oxides by analytical electron microscopy
  18. Synthesis and NMR characterization (1H and 31P MAS) of the fluorine-free hydroxylapatite–britholite-(Y) series
  19. Quantum mechanical calculations of dioctahedral 2:1 phyllosilicates: Effect of octahedral cation distributions in pyrophyllite, illite, and smectite
  20. The nature of disorder in montmorillonite by simulation of X-ray powder patterns
  21. Ferripedrizite, a new monoclinic BLi amphibole end-member from the Eastern Pedriza Massif, Sierra de Guadarrama, Spain, and a restatement of the nomenclature of Mg-Fe-Mn-Li amphiboles
  22. Description and crystal structure of vajdakite, [(Mo6+O2)2(H2O)2 As3+ 2O5]·H2O—A new mineral from Jáchymov, Czech Republic
  23. Some remarks on fission-track observational biases and crystallographic orientation effects
  24. Surface reconstruction and As-polymerization at fractured loellingite (FeAs2) surfaces
  25. The strength of moissanite
  26. Diamond formation through carbonate-silicate interaction
  27. Anisotropic Fe-Mg diffusion in biotite
  28. Characterization of a high-pressure phase of silica from the Martian meteorite Shergotty
https://doi.org/10.2138/am-2002-0728

Articles in the same Issue

  1. Thermal equations of state for B1 and B2 KCl
  2. Determination of molar absorptivities for infrared absorption bands of H2O in andesitic glasses
  3. H2O activity in H2O-N2 fluids at high pressure and temperature measured by the brucitepericlase equilibrium
  4. Kinetics of iron oxidation-reduction in hydrous silicic melts
  5. Kinetics of cation ordering in synthetic MgAl2O4 spinel
  6. Structural properties and heat-induced oxidation-dehydrogenation of manganoan ilvaite from Perda Niedda mine, Sardinia, Italy
  7. Ultrahigh-pressure metamorphism in western Tianshan, China: Part I. Evidence from inclusions of coesite pseudomorphs in garnet and from quartz exsolution lamellae in omphacite in eclogites
  8. Ultra-high pressure metamorphism in western Tianshan, China: Part II. Evidence from magnesite in eclogite
  9. Discovery of clinoenstatite in garnet pyroxenites from the Dabie-Sulu ultrahigh-pressure terrane, east-central China
  10. Ultrahigh-pressure (UHP) low-Al titanites from carbonate-bearing rocks in Dabieshan- Sulu UHP terrane, eastern China
  11. Metamictization and recrystallization of titanite: An infrared spectroscopic study
  12. Fine structure of infrared OH-stretching bands in natural and heat-treated amphiboles of the tremolite-ferro-actinolite series
  13. Correlation between OH concentration and oxygen isotope diffusion rate in diopsides from the Adirondack Mountains, New York
  14. The substitution Fe3+-Al and the isosymmetric displacive phase transition in synthetic zoisite: A powder X-ray and infrared spectroscopy study
  15. In situ X-ray observation of the reaction dolomite = aragonite + magnesite at 900–1300 K
  16. High-pressure single-crystal X-ray and powder neutron study of F,OH/OD-chondrodite: Compressibility, structure, and hydrogen bonding
  17. Quantitative characterization of biotic iron oxides by analytical electron microscopy
  18. Synthesis and NMR characterization (1H and 31P MAS) of the fluorine-free hydroxylapatite–britholite-(Y) series
  19. Quantum mechanical calculations of dioctahedral 2:1 phyllosilicates: Effect of octahedral cation distributions in pyrophyllite, illite, and smectite
  20. The nature of disorder in montmorillonite by simulation of X-ray powder patterns
  21. Ferripedrizite, a new monoclinic BLi amphibole end-member from the Eastern Pedriza Massif, Sierra de Guadarrama, Spain, and a restatement of the nomenclature of Mg-Fe-Mn-Li amphiboles
  22. Description and crystal structure of vajdakite, [(Mo6+O2)2(H2O)2 As3+ 2O5]·H2O—A new mineral from Jáchymov, Czech Republic
  23. Some remarks on fission-track observational biases and crystallographic orientation effects
  24. Surface reconstruction and As-polymerization at fractured loellingite (FeAs2) surfaces
  25. The strength of moissanite
  26. Diamond formation through carbonate-silicate interaction
  27. Anisotropic Fe-Mg diffusion in biotite
  28. Characterization of a high-pressure phase of silica from the Martian meteorite Shergotty
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