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Now showing items 3412-3431 of 39124
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(2001)Two Na uranyl molybdates, K6[(UO2)2O(MoO4)4], have been synthesized by high-temperature solid-state reactions of mixtures of Na2CO3, K2CO3, UO3 and MoO3. All three structures were solved by direct methods and refined on ...
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(2003)Compositional and structural characteristics of ore minerals were studied in detail using a combination of physical and chemical methods with wide application of modern equipment and sophisticated programs for data processing. ...
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(2002)The analysis of the preferred orientation of crystals (crystal fabric) in magmatic rocks has become a widely used technique for the reconstruction of the flow history. However, little is known about the evolution of the ...
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(2000)Feldspars and normative feldspar constituents of bulk magma show trends supportive of fractional crystallization in the three main types of <rm>hy</rm>-normative intraplate suites that contain <rm>qz</rm>-oversaturated ...
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(2002)The Oshurkovo Complex is a plutonic sheeted complex which represents numerous successive magmatic injections into an expanding system of subparallel and subvertical fractures. It comprises a wide range of rock types including ...
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(2004)Schoepite. [(UO2)(8)O-2(OH)(12)](H2O)(12), precipitates through interaction of acidic and basic uranyl solutions with calcite. The uranyl solutions have (UO2)(2+) concentrations between 1.5 and 50 mmol L-1, and initial pH ...
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(1990)x-Andalusite is a widely occurring phase, generated at high water temperatures and vapor pressures in the system Al2O3-SiO2-H2O. However, the structure of its lattice is not easy to decipher because the crystals are very ...
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(IOP Publishing, 2015)The investigated crystal morphology and thermal EMF of pyrites in the western flank of Sukholozsky ore field showed that the pyrite crystals have cubic habitus with a weakly-developed face {210}. The crystal faces {100} ...
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(1987)The authors analyzed diamonds from rutile-sphene eclogite bodies whose garnet is not pyrope, but andradite, and which lack omphacite pyroxene. These eclogite bodies occur within local ring structures, revealed by remote ...
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(2004)Feldspar nucleation rate data obtained by laboratory decompression of hydrous silicate melt are interpreted in view of the classical theory of nucleation (CNT) and a non-classical variation, the diffuse-interface theory ...
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(2002)Synchrotron excited X-ray photoelectron spectra (SXPS) of hexagonal pyrrhotite reveal three distinct Fe 3d-derived photopeaks within its outer valence band. The t2gα band (majority spin) is centered at about 2.5 eV, the ...
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(2000)We show that 206Pb/238U ratios measured in baddeleyite by ion microprobe vary significantly (up to +/-10% or more) and systematically with the relative orientation of the baddeleyite crystal structure and the primary ion ...
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(2001)Six kaolinite [A12Si2O5(OH)4] samples were synthesized under different conditions of temperature, pressure, and pH from two different starting materials. Chemical composition and properties of the samples were characterized ...
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(1988)Crystal size distributions (CSDs) measured in metamorphic rocks yield quantitative information about crystal nucleation and growth rates, growth times, and the degree of overstepping (T) of reactions during metamorphism. ...
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(2002)This study demonstrates the value of the combined use of scaling analysis and crystal size distribution (CSD) measurements in the interpretation of igneous textures and outlines applications of these methods to other ...
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(2003)Crystal size distributions (CSDs) of quartz and zircon phenocrysts in individual pumice clasts from several voluminous ash-flow tuffs provide a quenched snapshot view of con-ditions in preclimactic magma chambers. A common ...
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(2005)The crystal chemistry of three Li-bearing mica-2M2 crystals from pegmatites has been studied by chemical analyses and single crystal X-ray diffraction; their belonging to the trilithionite-polylithionite join is highlighted ...
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(1999)The crystal structure of a synthetic two-layer polytype of CaSiO 3 pseudowollastonite was determined using single-crystal X-ray diffraction data. It is monoclinic with space group C2/c and unit-cell parameters a = 11.8322(6), ...
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(2002)The crystal structure of a synthetic potassic-ferri-ferrorichterite, ideally K(Ca0.5Na1.5)Fe5Si8O22(OH)(2) was refined from single-crystal X-ray imaging plate diffraction data at 298 K and I 10 K. The title compound is ...
Now showing items 3412-3431 of 39124