skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Reexamination of the structure of opal-A: A combined study of synchrotron X-ray diffraction and pair

Journal Article · · Am. Mineral.
DOI:· OSTI ID:1900923

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
Sponsoring Organization:
DOE - Office Of Science
Journal Information:
Am. Mineral., Vol. 107, Issue (7)
Country of Publication:
United States

References (62)

State-Of-The-Art High-Resolution Powder X-Ray Diffraction (Hrpxrd) Illustrated with Rietveld Structure Refinement of Quartz, Sodalite, Tremolite, and Meionite journal December 2008
Refinement of a coesite structure journal August 1969
Beyond crystallography: the study of disorder, nanocrystallinity and crystallographically challenged materials with pair distribution functions journal January 2004
The Problem with Determining Atomic Structure at the Nanoscale journal April 2007
State of water molecules and silanol groups in opal minerals: a near infrared spectroscopic study of opals from Slovakia journal September 2011
29Si and 27Al NMR study of amorphous and paracrystalline opals from Australia journal December 2003
HRTEM of microcrystalline opal in chert and porcelanite from the Monterey Formation, California journal December 1996
The infrared determination of opal in siliceous deep-sea sediments journal October 1968
Rapid-acquisition pair distribution function (RA-PDF) analysis journal November 2003
The occurrence and significance of biogenic opal in the regolith journal February 2003
A Review of the Classification of Opal with Reference to Recent New Localities journal May 2019
Opals journal April 1976
Variations in Water Content in Opal-A and Opal-CT from Geyser Discharge Aprons journal April 2008
Distinguishing well ordered opal-CT and opal-C from high temperature cristobalite by x-ray diffraction journal February 1994
The geochemistry of gem opals as evidence of their origin journal September 2008
Common gem opal: An investigation of micro- to nano-structure journal November 2008
XRPD patterns of opals: A brief review and new results from recent studies journal September 2010
Small angle neutron scattering by opals journal February 1997
XRD and 29Si MAS-NMR study on some non-crystalline silica minerals journal April 1990
Cryptomelane formation from nanocrystalline vernadite precursor: a high energy X-ray scattering and transmission electron microscopy perspective on reaction mechanisms journal September 2015
Modeling the X-ray diffraction pattern of opal-CT journal August 1995
X-ray, DTA and Raman studies of monoclinic tridymite and its higher temperature orthorhombic modification with varying temperature journal January 2005
Structural state of microcrystalline opals: A Raman spectroscopic study journal August 2007
Intermediate-range structure and low-energy dynamics of densified SiO2 glass journal December 1997
Water Content of Opal-A: Implications for the Origin of Laminae in Geyserite and Sinter journal January 2004
The nature of opal I. nomenclature and constituent phases journal May 1971
Structure of Opal journal December 1964
PDFgetX3 : a rapid and highly automatable program for processing powder diffraction data into total scattering pair distribution functions journal March 2013
Diagenesis of siliceous oozes—I. Chemical controls on the rate of opal-A to opal-CT transformation—an experimental study journal August 1977
One-Step Route Synthesis of Siliceous Six-Line Ferrihydrite: Implication for the Formation of Natural Ferrihydrite journal February 2019
Using Complementary Methods of Synchrotron Radiation Powder Diffraction and Pair Distribution Function to Refine Crystal Structures with High Quality Parameters—A Review journal January 2020
Opal‐A in the Nakhla meteorite: A tracer of ephemeral liquid water in the Amazonian crust of Mars journal June 2015
Coesite Formation at Low Pressure during Supersonic Microprojectile Impact of Opal journal July 2020
Crystal Structure of Moganite and Its Anisotropic Atomic Displacement Parameters Determined by Synchrotron X-ray Diffraction and X-ray/Neutron Pair Distribution Function Analyses journal March 2021
Australian sedimentary opal-A and its associated minerals: Implications for natural silica sphere formation journal July 2014
High-pressure x-ray diffraction of SiO 2 glass journal August 1992
Structural relationship between coesite and feldspar journal March 1970
A simple method for the rapid determination of biogenic opal in pelagic marine sediments journal September 1989
Surface sites and unrelaxed surface energies of tetrahedral silica polymorphs and silicate journal December 2005
Close-packed structures of spheres of two different sizes II. The packing densities of likely arrangements journal December 1980
Links between iron input and opal deposition in the Pleistocene equatorial Pacific Ocean journal March 2012
The crystal structure of low melanophlogite journal November 2001
Thermochemistry of guest-free melanophlogite journal October 2003
1H, 29Si and 27Al NMR study of the destabilization process of a paracrystalline opal from Mexico journal June 2007
Identification of Raman Defect Lines as Signatures of Ring Structures in Vitreous Silica journal June 1998
The Formation of Precious Opal: Clues from the Opalization of bone journal February 2008
Atomic pair distribution function analysis of materials containing crystalline and amorphous phases journal December 2005
A review of the Si cycle in the modern ocean: recent progress and missing gaps in the application of biogenic opal as a paleoproductivity proxy journal December 2000
In Situ Analysis of Opal in Gale Crater, Mars journal August 2018
Colour of Precious Opal journal December 1964
Sixfold-Coordinated Amorphous Polymorph of SiO 2 under High Pressure journal December 2008
Opal, cristobalite, and tridymite: Noncrystallinity versus crystallinity, nomenclature of the silica minerals and bibliography journal March 1998
Distinct Geologic Settings of Opal‐A and More Crystalline Hydrated Silica on Mars journal October 2018
GSAS-II : the genesis of a modern open-source all purpose crystallography software package journal March 2013
Single-crystal X-ray and Raman investigation on melanophlogite from Varano Marchesi (Parma, Italy) journal January 2008
X-ray and Neutron Study on the Structure of Hydrous SiO2 Glass up to 10 GPa journal January 2020
The structure of opal-CT revisited journal December 2014
Phase transitions induced by solid solution in stuffed derivatives of quartz: A powder synchrotron XRD study of the LiAlSiO 4 -SiO 2 join journal July 2000
Crystal Chemistry and Phase Transitions in Substituted Pollucites along the CsAlSi2O6-CsTiSi2O6.5 Join: A Powder Synchrotron X-ray Diffractometry Study journal May 2002
Compressibility and pressure-induced amorphization of guest-free melanophlogite: An in-situ synchrotron X-ray diffraction study journal January 2007
A new polymorph of eucryptite (LiAlSiO 4 ), ε-eucryptite, and thermal expansion of α- and ε-eucryptite at high pressure journal April 2002
Constraining silicon isotope exchange kinetics and fractionation between aqueous and amorphous Si at room temperature journal May 2019