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Browsing ELibrary by Title
Now showing items 5320-5339 of 21638
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(1992)At pressures higher than ∼22 kbar, near-solidus melts of peridotite + CO2 + H2O are carbonatitic and may be able to separate from their source regions at liquid fractions as low as 0.01%. At such low degrees of partial ...
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(2002)Pressure-induced structural modifications in the zeolite bikitaite are studied by means of in situ synchrotron X-ray powder diffraction and ab initio molecular dynamics. The experimental cell parameters were refined up to ...
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(1999)The high-pressure response of the cell parameters of calcite, CaCO3, has been investigated by single crystal X-ray diffraction. The unit cell parameters have been refined from 0 to 1.435 GPa, and the linear and volume ...
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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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(2003)The crystal structure of synthetic kosmochlor, NaCrSi2O6, was studied using single crystal X-ray diffraction at high pressure. A four-pin diamond anvil cell, with 4:1 methanol:ethanol pressure me-dium, was used to achieve ...
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(2002)Pressure-induced structural modifications in scolecite were studied by means of in situ synchrotron X-ray powder diffraction and density functional computations. The experimental cell parameters were refined up to 8.5 GPa. ...
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(1999)The room-temperature static compression of magnesite (MgCO 3 ) has been measured by X-ray powder energy-dispersive diffraction in a diamond-anvil cell. Different pressure transmitting media and an internal pressure standard ...
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(2004)High-pressure, high-temperature diamond growth experiments have been conducted in the system C–K2CO3–KCl at 1050–1420 °C, 7.0–7.7 GPa. KCl is of interest because of the strong effect of halogens on the phase relations of ...
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(2003)High-pressure granulites are characterised by the key associations garnet-clinopyroxene-plagioclase-quartz (in basic rocks) and kyanite-K-feldspar (metapelites and felsic rocks) and are typically orthopyroxene-free in both ...
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(1996)Luminescence spectroscopy of transition elements can provide useful information on their binding properties, local environment and crystal-field stabilization energies in various materials. In order to investigate the ...
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(2003)High-pressure multi-anvil experiments (5 to 10 GPa) have been conducted on a basalt + calcite mixture in order to constrain the fate of carbonates carried on subducted ocean floor. Up to 6 GPa, carbonate breakdown occurs ...
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(2003)Mafic microgranular enclaves, composed of diopside and rare magnesium biotite phenocrysts in a groundmass of diopside, biotite, apatite, Fe-Ti-oxides, and alkali feldspar, are associated with Neoproterozoic Piquiri potassic ...
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(2003)Many ocean island basalts (OIB) that have isotopic ratios indicative of recycled crustal components in their source are silica-undersaturated and unlike silicic liquids produced from partial melting of recycled mid-ocean ...
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(2004)We review experimental phase equilibria associated with partial melting of mafic lithologies (pyroxenites) at high pressures to reveal systematic relationships between bulk compositions of pyroxenite and their melting ...
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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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(1995)The phase behaviour of the carbonates in the system MgO-CaO-SiO2-CO2 have been studied in a diamond-anvil press employing YAG laser heating from about 40 to 260 kbar at # 1000°C. It is already known that at the CaCO3-MgCO3 ...
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(2002)Infrared absorption spectra of brucite Mg (OH)2 were measured under high pressure and high temperature from 0.1 MPa 25 °C to 16 GPa 360 °C using infrared synchrotron radiation at BL43IR of Spring-8 and a high-temperature ...
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(2001)The Raman spectra of synthetic α-Co2SiO4 and α-Ni2SiO4 olivines have been studied at room temperature and various pressures. All the Raman frequencies of the two olivines increase with increasing pressure, and most of the ...
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(2001)The structural evolution up to 5 GPa of a natural heulandite was studied using in situ single-crystal X- ray diffraction data from a diamond-anvil cell (DAC) with glycerol as the pressure transmitting medium. Linear ...
Now showing items 5320-5339 of 21638