Browsing by Subject "X-RAY DIFFRACTION"
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Browsing by Subject "X-RAY DIFFRACTION"
Now showing items 1-20 of 27
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(2006)The necessity of eliminating debris from a granite quarry has awakened an interest in applications of by-products, called “marginal arids”, in different fields, like construction and foundations for roadways, restoration, ...
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(2006)Tephras, mainly from Iceland, are becoming increasingly important in interpreting leads and lags in the Holocene climate system across NW Europe. Here we demonstrate that Quantitative Phase Analysis of x-ray diffractograms ...
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(2002)The material described as ''mineral matter'' in coal encompasses dissolved salts in the pore water and inorganic elements associated with the organic compounds, as well as discrete crystalline and non-crystalline mineral ...
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(1996)Viséite is a poorly crystalline mineral which is difficult to study by X-ray diffraction pattern. NMR is a very useful technique to study such poorly crystalline minerals, and 31P, 27Al, and 29Si MAS NMR in conjunction ...
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(2001)The elastic properties of CaSnO3 perovskite have been measured by both ultrasonic interferometry and single-crystal X-ray diffraction at high pressures. The single-crystal diffraction data collected using a diamond-anvil ...
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HIGH-PRESSURE BEHAVIOUR ALONG THE JADEITE NAALSI2O6-AEGIRINE NAFESI2O6 SOLID SOLUTION UP TO 10 GPA (2006)The volume variation as a function of pressure along the jadeite-aegirine solid solution was determined at room temperature up to pressures between 6.5 and 9.7 GPa by single-crystal X-ray diffraction. The unit-cell volumes ...
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(2001)The crystal structure of MgFe2O4 was investigated by in situ X-ray diffraction at high pressure, using YAG laser annealing in a diamond anvil cell. Magnesioferrite undergoes a phase transformation at about 25 GPa, which ...
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(2006)In-situ X-ray powder diffraction measurements conducted under high pressure confirmed the existence of an unquenchable orthorhombic perovskite in ZnGeO3. ZnGeO3 ilmenite transformed into perovskite at 30.0 GPa and 1300±150 K ...
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(2006)The coal of the Miocene Bukit Asam deposit in south Sumatra is mostly sub-bituminous in rank, consistent with regional trends due to burial processes. However, effects associated with Plio-Pleistocene igneous intrusions ...
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(Федеральное государственное автономное образовательное учреждение высшего образования «Крымский федеральный университет имени В. И. Вернадского», 2014)Методами рентгеновской дифрактометрии и растровой электронной микроскопии был исследован минеральный состав трех осколков Сихотэ-Алиньского метеорита. Установлено, что кристаллическая матрица всех образцов состоит из ...
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(2004)In situ high-pressure synchrotron X-ray diffraction and infrared absorption experiments for gibbsite were performed at room temperature up to 53 and 25 GPa, respectively. A phase transition was confirmed at about 2.5 GPa. ...
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(2001)The structure of the cristobalite-like polymorph of phosphorus oxynitride PON has been refined using neutron powder diffraction data. It is tetragonal, space group I&4macr;2d, Z=4. The four P-(O,N) distances are equal but ...
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(2003)The crystal structure of a synthetic Rb analog of tetra-ferri-annite (Rb-TFA) 1M with the composition Rb0.99Fe2+3.03(Fe3+ 1.04 Si2.96)O10.0(OH)2.0 was determined by the single-crystal X-ray diffraction method. The structure ...
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(2003)A Raman scattering and X-ray diffraction study of the thermal decomposition of a naturally occurring, ettringite-group crystal is presented. Raman spectra, recorded with increasing temperature, indicate that the thermal ...
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(2006)A representative collection of iron-poor non-stoichiometric sedimentary dolomite samples of various composition, location, and age was studied by X-ray qualitative and quantitative phase analysis as well as by coupled ...
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(2001)Using single-crystal X-ray diffraction from a diamond anvil cell, the compressibility of a synthetic fluorapatite was determined up to about 7 GPa. The compression pattern was anisotropic, with greater change along a than ...
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(2006)The molecular-level processes that control green rust sodium sulphate (GRNa, SO4) reaction with chromate were studied using high-resolution techniques. Changes in solid morphology, structure and composition were observed ...
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(2001)The structural behavior of stuffed derivatives of quartz within the Li1−x Al1−x Si1+x O4 system (0 ≤ x ≤ 1) has been studied in the temperature range 20 to 873 K using high-resolution powder synchrotron X-ray diffraction ...
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(2003)An equation of state for Mg(OH)2 brucite under high-pressure and high-temperature conditions has been obtained by measuring temperature dependence of volume up to 600 K at ambient pressure and pressure dependence of volume ...
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(2004)The structural changes of CaSnO3, a GdFeO3-type perovskite, have been investigated to 7 GPa in a diamond-anvil cell at room temperature using single-crystal X-ray diffraction. Significant changes are observed in both the ...
Now showing items 1-20 of 27