Browsing ELibrary by Subject "RAMAN SPECTROSCOPY"
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Browsing ELibrary by Subject "RAMAN SPECTROSCOPY"
Now showing items 1-13 of 13
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(2001)We present Raman and infrared spectra of gypsum to 21 GPa at 300 K. Our measurements encompass the internal modes of the (SO4ont size=-1>-4 up that lie between 400 and 1150 cm-1ydroxyl-stretching vibrations between 3200 ...
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(2006)Single-crystal polarized Raman spectra (80 to 4000 cm-1 at 4 ≤ T ≤ 700 K) and powder IR spectra (1500 to 4000 cm-1 at 50 < T < 300 K) were measured for two microporous zeolites natrolite, Na16[Al16Si24 O80]·16H2O, and ...
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(2002)Thorough understanding of the shock metamorphic signatures of zircon could be the basis for the use of this mineral as a powerful tool for the study of old, deeply eroded, and metamorphically overprinted impact structures ...
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(2001)Raman and XANES spectroscopy were carried out on a series of glasses of composition 44CaO-12Al2O3-44SiO2, formed at pressures up to 10 GPa by isobaric quench from a temperature of 2200°C. The most significant changes in ...
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(2004)Four main serpentine varieties can be distinguished on the basis of their microstructures, i.e. lizardite, antigorite, chrysotile and polygonal serpentine. Among these, antigorite is the variety stable under high pressure. ...
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(2002)Premelting effects in gehlenite (Ca2Al2SiO7) have been studied by Raman spectroscopy and calorimetry, and in gehlenite and pseudowollastonite (CaSiO3) by electrical conductivity. The enthalpy of premelting of gehlenite is ...
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(2006)The determination of total water content (H2OT: 0.1-10 wt%) and water speciation (H2Omolecular/OH) in volcanic products by confocal microRaman spectrometry are discussed for alkaline (phonolite) and calcalkaline (dacite ...
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(1998)One-molal solutions of potassium carbonate and potassium bicarbonate were investigated by Raman spectroscopy from 22° to 550°C and from 1000 to 2000 bar. Experiments were performed in a special hydrothermal pressure vessel ...
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(2001)Raman spectra of hydrous beta-Mg2SiO4 (1.65wt% H2O) have been measured in a diamond-anvil cell with helium as a pressure-transmitting medium at room temperature to 50GPa. We observe three OH-stretching modes, a doublet ...
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(2002)Raman spectra of a single-crystal fragment of hydrous γ-Mg2SiO4, synthesized in a multianvil press, have been measured in a diamond-anvil cell with helium as pressure-transmitting medium to 56.5 GPa at room temperature. ...
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(2000)A 2.0 molal solution of sodium acetate and 0.1, 0.5, and 1.0 molal solutions of calcium acetate were investigated by Raman spectroscopy from 22 to 400°C at 1000 and 2000 bar. Experiments were performed in a special ...
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(2002)In-situ Raman measurements of silica speciation in aqueous fluids in equilibrium with solid quartz are reported to 14 kbar and 900 °C. Silica speciation in the fluid depends strongly on temperature and pressure. The Raman ...
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(2002)Raman spectra of diopside were collected from atmospheric pressure to 71 GPa. The pressure dependences of 22 modes were determined. Changes occurred in the spectra at three different pressures. First, at approximately 10 ...
Now showing items 1-13 of 13