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Browsing ELibrary by Title
Now showing items 1523-1542 of 21934
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(2000)The bonding and dynamics of Mg in pyrope are investigated using density functional theory calculations. The potential which the Mg experiences is highly anisotropic and in one direction is strongly anharmonic. Frequencies ...
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(2002)The charge density and bond character of the rutile-type structure of SiO2 (stishovite) under compression to 30 GPa were investigated by X-ray diffraction study using synchrotron radiation and AgKα rotating anode X-ray ...
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(1999)The Si L 2,3 core-loss edge can be used to probe the crystal chemistry around Si, providing information on the s-and d-like partial density of unoccupied states of the Si-O bonds. We present Si L 2,3 edges from 59 silicates, ...
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(2002)We combined synchrotron-based X-ray absorption near edge structure (XANES) spectroscopy, extended X-ray absorption fine structure (EXAFS) spectroscopy and binding affinity studies to determine the coordination, geometry, ...
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(2003)The fraction of O atoms as non-bridging O atoms (NBO) can be well approximated based on composition alone in many silicate glasses, but the NBO preference for specific network forming cations is much less well known. Using ...
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(1987)Dredging on the island slope of the Izu Trench brought up volcanic rocks of the marianite-boninite series among fragments of the ophiolite complex. One distinguishing feature of these marianite-boninite rocks is the presence ...
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(1997)Spatial correlations of principal Late Paleozoic biochores usually referred to as boreal and tropical communities are discussed. The distribution of corresponding geographic ranges is shown to be inconsistent with the ...
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(1999)Deposits and boreal marine fossils of the Upper Bathonian are discovered in the Volga River middle courses, the central Russian plain. The deposits occur below the elatmae Zone considered as the East European equivalent ...
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(1997)We offer a boreal zonal standard scale providing an effective panboreal correlation and current geological dating of Mesozoic boreal sediments. The need for establishment of a boreal standard is brought about by the fact ...
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(2003)Mollusk migrations of various intensity in the Kimmeridgian to Valanginian time span were established in the Boreal Atlantic (West and East European Provinces), Boreal Pacific (Chukotka-Canadian and Boreal Pacific Provinces), ...
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(2004)High-resolution flowmeter measurements such as those obtained with heat-pulse and electromagnetic flowmeters are often analyzed to produce in situ permeability profiles of heterogeneous aquifers. However, the borehole ...
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(2004)This paper concerns the interpretation of borehole geophysical data from basalt sequences, especially continental basalt sequences that host aquifers. Based on modifications of the rules used for interpreting borehole data ...
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(2006)Boric acid, B(OH)3, forms complexes in aqueous solution with a number of bidentate O-containing ligands, HL-, where H2L is C2O4H2 (oxalic acid), C3O4H4 (malonic acid), C2H6O2 (ethylene glycol), C6H6O2 (catechol), C10H8O2 ...
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(2005)B(OH)3 and CO2 are acidic species of considerable geochemical importance, yet the microscopic nature of the acid dissociation reactions for these B and C species is not well understood. Quantum mechanical methods have ...
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(2004)We show that the linearized reflection coefficients for arbitrary anisotropic media embedded in an isotropic background can be derived directly from a Born formalism. Due to rapidly varying phases of the scattered waves ...
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(2003)Borocookeite, ideally Li1+3xAl4–x(BSi3)O10(OH,F)8 (where “x” varies in the range 0.00–0.33 apfu), in which [4]Al is replaced by B relative to cookeite, occurs as a late-stage pocket mineral in the Sosedka and Mokhovaya ...
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(2004)The concentrations of B, F, and other "crustal" elements (Li, Sn, Rb, and Cs) in some mantle-derived rocks from the Pamirs and Tien Shan are higher than in the Earth's crust. In the mantle F is largely related to K being ...
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(1997)Experiments at 750 °C, 200 MPa(H2O), a (H2O)=1, and fO2 - Ni-NiO established that the equilibrium among tourmaline, biotite, cordierite, and melt (± spinel, aluminosilicate, or corundum) occurs with ∼2 wt% B2O3 in strongly ...
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(2001)Experiments were performed to measure the isotopic fractionation of boron between illite/smectite (I/S) clay minerals and water as a function of temperature (300° and 350°C) and degree of illitization. Corresponding changes ...
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(2005)Boron isotope composition of marine carbonates has been proposed as a paleo-pH proxy and potential tool to reconstruct atmospheric pCO2. The precise knowledge of the boron isotopic composition of ancient seawater represents ...
Now showing items 1523-1542 of 21934