Artikel
Lizenziert
Nicht lizenziert
Erfordert eine Authentifizierung
Transformation of SiO2 to the amorphous state by shearing at high pressure
-
Hiroshi Furuichi
,
Nobuyuki Fujii
Veröffentlicht/Copyright:
31. März 2015
Abstract
A natural α-quartz disc with flat surfaces perpendicular to (100) was sheared at 5 GPa in order to confirm that the sheared state at high pressure is not always the same as that obtained at high hydrostatic pressure. A transmission X-ray diffraction pattern taken from the sample that was sheared at high pressure revealed five broad halo rings; the pattern was taken about three months after the highpressure experiment. The ratios of the interplanar spacing corresponding to the densest radius of the smallest ring to those of the other ones are 0.610, 0.514, 0.459, and 0.399, respectively. This set of rings does not appear from α-quartz. These are approximately equal to those obtained from solids with space group Fd3m. A Raman spectroscopic study also showed the structural change due to shearing at high pressure. The spectrum appears neither from α-quartz nor from coesite. These facts indicate, therefore, that the crystalline α-quartz sample transformed to the amorphous state based on a structure consistent with Fd3m space group.
Received: 2002-8-13
Accepted: 2002-12-24
Published Online: 2015-3-31
Published in Print: 2003-5-1
© 2015 by Walter de Gruyter Berlin/Boston
Sie haben derzeit keinen Zugang zu diesem Inhalt.
Sie haben derzeit keinen Zugang zu diesem Inhalt.
Artikel in diesem Heft
- TEM study of mullite growth after muscovite breakdown
- The reduction of aqueous Au3+ by sulfide minerals and green rust phases
- Manganoan kinoshitalite in Mn-rich marble and skarn from Virginia
- Expandability of anchizonal illite and chlorite: Significance for crystallinity development in the transition from diagenesis to metamorphism
- X-ray absorption spectroscopy of silicates for in situ, sub-micrometer mineral identification
- Radiation damage in zircon
- Neutron and temperature-resolved synchrotron X-ray powder diffraction study of akaganéite
- Li-rich zincostaurolite and its decompression-related breakdown products in a diaspore-bearing metabauxite from East Samos (Greece): An EMP and SIMS study
- Olivine from planetary basalts: Chemical signatures that indicate planetary parentage and those that record igneous setting and process
- Observations on the relationship between crystallographic orientation and biasing in apatite fission-track measurements
- Borocookeite, a new member of the chlorite group from the Malkhan gem tourmaline deposit, Central Transbaikalia, Russia
- New thermochemical evidence on the stability of dickite vs. kaolinite
- Thermodynamics of Fe oxides: Part I. Entropy at standard temperature and pressure and heat capacity of goethite (α-FeOOH), lepidocrocite (γ-FeOOH), and maghemite (γ-Fe2O3)
- Thermodynamics of Fe oxides: Part II. Enthalpies of formation and relative stability of goethite (α-FeOOH), lepidocrocite (γ-FeOOH), and maghemite (γ-Fe2O3)
- An in situ neutron diffraction study of cation disordering in synthetic qandilite Mg2TiO4 at high temperatures
- Peristeritic plagioclase in North Sea hydrocarbon reservoir rocks: Implications for diagenesis, provenance and stratigraphic correlation
- Incorporation of Ni into natural goethite: An investigation by X-ray absorption spectroscopy
- Characterization of an early metamorphic stage through inclusions in zircon of a diamondiferous quartzofeldspathic rock from the Erzgebirge, Germany
- Gersdorffite (NiAsS) chemical state properties and reactivity toward air and aerated, distilled water
- The concentration and speciation of hydrogen in feldspars using FTIR and 1H MAS NMR spectroscopy
- The significance of mineral inclusions in large diamonds from Yakutia, Russia
- Letters. Evidence from surface phonons for the (2 × 1) reconstruction of the (101̄4) surface of calcite from computer simulation
- Transformation of SiO2 to the amorphous state by shearing at high pressure
Artikel in diesem Heft
- TEM study of mullite growth after muscovite breakdown
- The reduction of aqueous Au3+ by sulfide minerals and green rust phases
- Manganoan kinoshitalite in Mn-rich marble and skarn from Virginia
- Expandability of anchizonal illite and chlorite: Significance for crystallinity development in the transition from diagenesis to metamorphism
- X-ray absorption spectroscopy of silicates for in situ, sub-micrometer mineral identification
- Radiation damage in zircon
- Neutron and temperature-resolved synchrotron X-ray powder diffraction study of akaganéite
- Li-rich zincostaurolite and its decompression-related breakdown products in a diaspore-bearing metabauxite from East Samos (Greece): An EMP and SIMS study
- Olivine from planetary basalts: Chemical signatures that indicate planetary parentage and those that record igneous setting and process
- Observations on the relationship between crystallographic orientation and biasing in apatite fission-track measurements
- Borocookeite, a new member of the chlorite group from the Malkhan gem tourmaline deposit, Central Transbaikalia, Russia
- New thermochemical evidence on the stability of dickite vs. kaolinite
- Thermodynamics of Fe oxides: Part I. Entropy at standard temperature and pressure and heat capacity of goethite (α-FeOOH), lepidocrocite (γ-FeOOH), and maghemite (γ-Fe2O3)
- Thermodynamics of Fe oxides: Part II. Enthalpies of formation and relative stability of goethite (α-FeOOH), lepidocrocite (γ-FeOOH), and maghemite (γ-Fe2O3)
- An in situ neutron diffraction study of cation disordering in synthetic qandilite Mg2TiO4 at high temperatures
- Peristeritic plagioclase in North Sea hydrocarbon reservoir rocks: Implications for diagenesis, provenance and stratigraphic correlation
- Incorporation of Ni into natural goethite: An investigation by X-ray absorption spectroscopy
- Characterization of an early metamorphic stage through inclusions in zircon of a diamondiferous quartzofeldspathic rock from the Erzgebirge, Germany
- Gersdorffite (NiAsS) chemical state properties and reactivity toward air and aerated, distilled water
- The concentration and speciation of hydrogen in feldspars using FTIR and 1H MAS NMR spectroscopy
- The significance of mineral inclusions in large diamonds from Yakutia, Russia
- Letters. Evidence from surface phonons for the (2 × 1) reconstruction of the (101̄4) surface of calcite from computer simulation
- Transformation of SiO2 to the amorphous state by shearing at high pressure
