FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2023247269> ?p ?o ?g. }

• W2023247269 startingPage "5040" @default.
• W2023247269 abstract "The study of meteorites depends largely on finding samples that may have been under the influence of the environment for over hundred years. An interdisciplinary study is under way with meteorite samples from the Atacama Desert, one of the oldest and driest desert of the world, in an attempt to understand the weathering processes acting on these primitive materials and the conditions of the accumulation surfaces that have preserved them. Those samples may have undergone weathering processes that may result in large changes of their original phases. Oxidation is certainly the most important reaction to consider and their products are usually crystalline oxides associated to the iron matrix. This paper reports the results obtained by synchrotron radiation x-ray diffraction (SR-XRD) and Mossbauer spectroscopy (MS) investigation on ordinary chondrites from different areas of the Atacama Desert, Chile. X-ray diffraction is a natural choice to study crystalline materials but some attention must be paid to the experimental setup. To avoid the fluorescence from iron, one needs to use a monochromator, or a wavelength that reduces the iron fluorescence. Further, the small amount of the weathered phases requires very large acquisition times with normal laboratory diffractometers. Finally, many iron related oxides show very large peak superposition that makes very difficult their separation. The present research employs synchrotron light to enhance the intensity, to choose a wavelength that reduces iron fluorescence and to provide a very monochromatic x-ray. The SR-XRD was carried out at the Brazilian Synchrotron Light Laboratory in Campinas, Brazil. The D12A-XRD1 X-Ray Powder Diffraction beamline was used with wavelength 1.96888 A and Bragg-Brentano geometry. The data was recorded using 2θ range from 15° to 100° with the acquisition time determined by the total photon arriving at a calibration monitor. Rietveld refinement was done with the TOPAS-Academic software with the fundamental parameters approach. The pyroxene and olivine phases have the scattering factors for the sites with iron and magnesium calculated with mean compositions of these elements obtained from the microprobe. Preferred crystallographic orientation was partially accounted for with March-Dollase or Spherical Harmonics. Crystallites sizes were estimated with a lorentzian curve. Mossbauer measurements had also been performed in those samples with the quantification of total iron content inside each iron phase. The comparison between Rietveld and Mossbauer phase quantification had been done with the necessary conversion of the percentage of phase to molar percentage of iron in the specified phase. This conversion was calculated using the iron occupancy factor of the appropriate sites for each crystalline phase system, the number of molecules inside the unit cell and total cell mass of each phase." @default.
• W2023247269 created "2016-06-24" @default.
• W2023247269 creator A5019153175 @default.
• W2023247269 creator A5029623047 @default.
• W2023247269 creator A5038866421 @default.
• W2023247269 creator A5045279460 @default.
• W2023247269 creator A5063725856 @default.
• W2023247269 creator A5067941609 @default.
• W2023247269 date "2009-09-01" @default.
• W2023247269 modified "2023-09-27" @default.
• W2023247269 title "Characterization of Ordinary Chondrites from the Atacama Desert, Chile, by Synchrotron X-ray Diffraction and Mössbauer Spectroscopy" @default.
• W2023247269 cites W1973518565 @default.
• W2023247269 cites W2069421401 @default.
• W2023247269 cites W2074558603 @default.
• W2023247269 cites W2611496679 @default.
• W2023247269 hasPublicationYear "2009" @default.
• W2023247269 type Work @default.
• W2023247269 sameAs 2023247269 @default.
• W2023247269 citedByCount "0" @default.
• W2023247269 crossrefType "journal-article" @default.
• W2023247269 hasAuthorship W2023247269A5019153175 @default.
• W2023247269 hasAuthorship W2023247269A5029623047 @default.
• W2023247269 hasAuthorship W2023247269A5038866421 @default.
• W2023247269 hasAuthorship W2023247269A5045279460 @default.
• W2023247269 hasAuthorship W2023247269A5063725856 @default.
• W2023247269 hasAuthorship W2023247269A5067941609 @default.
• W2023247269 hasConcept C116862484 @default.
• W2023247269 hasConcept C120665830 @default.
• W2023247269 hasConcept C121332964 @default.
• W2023247269 hasConcept C127313418 @default.
• W2023247269 hasConcept C1276947 @default.
• W2023247269 hasConcept C130635790 @default.
• W2023247269 hasConcept C14112920 @default.
• W2023247269 hasConcept C16332341 @default.
• W2023247269 hasConcept C17409809 @default.
• W2023247269 hasConcept C185592680 @default.
• W2023247269 hasConcept C192562407 @default.
• W2023247269 hasConcept C199289684 @default.
• W2023247269 hasConcept C207114421 @default.
• W2023247269 hasConcept C21368211 @default.
• W2023247269 hasConcept C2778994143 @default.
• W2023247269 hasConcept C32891209 @default.
• W2023247269 hasConcept C40724407 @default.
• W2023247269 hasConcept C50515024 @default.
• W2023247269 hasConcept C6260449 @default.
• W2023247269 hasConcept C87355193 @default.
• W2023247269 hasConceptScore W2023247269C116862484 @default.
• W2023247269 hasConceptScore W2023247269C120665830 @default.
• W2023247269 hasConceptScore W2023247269C121332964 @default.
• W2023247269 hasConceptScore W2023247269C127313418 @default.
• W2023247269 hasConceptScore W2023247269C1276947 @default.
• W2023247269 hasConceptScore W2023247269C130635790 @default.
• W2023247269 hasConceptScore W2023247269C14112920 @default.
• W2023247269 hasConceptScore W2023247269C16332341 @default.
• W2023247269 hasConceptScore W2023247269C17409809 @default.
• W2023247269 hasConceptScore W2023247269C185592680 @default.
• W2023247269 hasConceptScore W2023247269C192562407 @default.
• W2023247269 hasConceptScore W2023247269C199289684 @default.
• W2023247269 hasConceptScore W2023247269C207114421 @default.
• W2023247269 hasConceptScore W2023247269C21368211 @default.
• W2023247269 hasConceptScore W2023247269C2778994143 @default.
• W2023247269 hasConceptScore W2023247269C32891209 @default.
• W2023247269 hasConceptScore W2023247269C40724407 @default.
• W2023247269 hasConceptScore W2023247269C50515024 @default.
• W2023247269 hasConceptScore W2023247269C6260449 @default.
• W2023247269 hasConceptScore W2023247269C87355193 @default.
• W2023247269 hasLocation W20232472691 @default.
• W2023247269 hasOpenAccess W2023247269 @default.
• W2023247269 hasPrimaryLocation W20232472691 @default.
• W2023247269 hasRelatedWork W1985856380 @default.
• W2023247269 hasRelatedWork W1999597063 @default.
• W2023247269 hasRelatedWork W2000972197 @default.
• W2023247269 hasRelatedWork W2031334703 @default.
• W2023247269 hasRelatedWork W2046993159 @default.
• W2023247269 hasRelatedWork W2051624176 @default.
• W2023247269 hasRelatedWork W2054089565 @default.
• W2023247269 hasRelatedWork W2055427187 @default.
• W2023247269 hasRelatedWork W2063850782 @default.
• W2023247269 hasRelatedWork W2087109774 @default.
• W2023247269 hasRelatedWork W2105697748 @default.
• W2023247269 hasRelatedWork W2110696766 @default.
• W2023247269 hasRelatedWork W2169505286 @default.
• W2023247269 hasRelatedWork W2231711332 @default.
• W2023247269 hasRelatedWork W2322045773 @default.
• W2023247269 hasRelatedWork W2589049218 @default.
• W2023247269 hasRelatedWork W2607091043 @default.
• W2023247269 hasRelatedWork W1571481268 @default.
• W2023247269 hasRelatedWork W2394825209 @default.
• W2023247269 hasRelatedWork W2609310496 @default.
• W2023247269 hasVolume "72" @default.
• W2023247269 isParatext "false" @default.
• W2023247269 isRetracted "false" @default.
• W2023247269 magId "2023247269" @default.
• W2023247269 workType "article" @default.