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Browsing ELibrary by Title
Now showing items 13823-13842 of 26297
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(2006)The single-crystal elastic constants of natural alunite (ideally KAl3(SO4)2(OH)6) were determined by Brillouin spectroscopy. Chemical analysis by electron microprobe gave a formula KAl3(SO4)2 (OH)6. Single crystal X-ray ...
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(2006)The single-crystal elastic properties of phase A have been investigated by Brillouin spectroscopy at ambient conditions. The Voigt-Reuss-Hill average for the adiabatic bulk and shear moduli are Ks = 106(1) GPa and μ = 61(1) ...
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(2004)Single-crystal elastic constants of a natural Fe-rich olivine (Fe 0.94 Mn 0.06) 2 SiO 4 were determined by Brillouin scattering to 12.1 GPa. The aggregate bulk modulus, shear modulus, and their pressure derivatives are K ...
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(1997)The complete set of elastic stiffness coefficients of a single crystal of Mg2SiO4 in the modified spinel (wadsleyite) structure are reported at eight pressures from ambient to 14 Gigapascals (GPa). All moduli vary linearly ...
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(2002)Single crystals of synthetic vanadium-, chromium- and cobalt-bearing garnets, Pyr:V0.06, Pyr:V0.13, Pyr:Cr0.04, Pyr:Co0.10, and Gt:Co3.00, and a natural vanadium-bearing grossular, Gross:V0.07 (Cr3+ < 0.005), were studied ...
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(2003)Unpolarized, (X,Y)-mixed electronic absorption spectra were measured on (001) plates of two natural orthopyroxenes with 24 and 45 mole % ferrosilite and with a Ca content 0.07 atoms pfu, at pressures up to 10.3 and 8.83 ...
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(2000)Pyrope single crystals doped with transition-metal ions (Co, Cr, Ni, Ti and V) were synthesised in a piston-cylinder device at 950-1050°C and 25 kbar. Stoichiometric oxide mixtures were used as starting materials and ...
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(2004)Synthesis experiments in the system MgAl2O4–MgFe2O4 [MgAl2−x Fex O4 (0 ≤ x ≤ 2)] were carried out using a PbF2 flux. The crystalline products synthesized in the compositional range of 0.6 <x ≤ 1.2 consisted of two spinel ...
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(2003)A sample of nepheline from Egan Chute, near Bancroft, Ontario, with a chemical composition (K1.332□ 0.68) (Na6.05Ca0.22) [Al7.77Si8.21O32], has been studied using single-crystal X-ray diffraction, transmission electron ...
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(2006)Tiny basaltic samples containing finely grained titanomagnetite with Curie temperature less than 100°C were heated in air in weak field (25-100μT) at temperatures between 400°C and 560°C for times as long as 32 hr. ...
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(1997)The Hecla Hoek Complex, a ∼ 18-km-thick succession in the Svalbard Caledonian Eastern Terrane, has been interpreted to be a more or less continuous volcano-sedimentary sequence. Amphibolite-facies rocks in the lower parts ...
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(2006)In order to elucidate the structural characteristics of the Yangsan Fault in southeastern Korea the Ganggu-Angang area has been studied in terms of fault branching and fault linkages. According to the results of this study, ...
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(1996)There are good grounds to correlate the Lower and Upper Sinian in China with the Baikalian and Yudomian (Vendian) in Siberia, correspondingly. Their comparison, based on event stratigraphy, is corrected by data on stratigraphy ...
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(2006)Shock recovery experiments of sinoite (Si2N2O) were carried out in a pressure range of 28-64 GPa. Post-shock samples were investigated by optical microscopy, X-ray diffraction, micro Raman spectroscopy, and transmission ...
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(2000)Two natural dunites were annealed at pressure P=300 MPa, temperature T=1373, 1473 and 1573 K, and fO2 within the stability field of olivine. The starting materials contained small amounts of hydroxyls in the form of minor ...
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(2006)In Jurassic Phragmoteuthis huxleyi Donovan (Order Phragmoteuthida) the siphuncular wall shows unique structural and morphological features. The septal neck is short, about one-eighth of chamber length, but the connecting ...
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(2004)A set of nine samples of axinite, selected from 60 specimens from worldwide localities, were investigated by single-crystal X-ray diffraction, electron and ion microprobe, and 57Fe Mössbauer spectroscopy. The selected ...
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(2002)In 1911, the surface-wave magnitude 8.2 Kemin earthquake hit northeastern Tien Shan (Kyrgyzstan), close to the cities of Bishkek and Almaty, the capitals of Kyrgyzstan and Kazakhstan, respectively. Several hundreds of ...
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(2002)Twelve nontronites and two ferruginous smectites have been characterized with respect to Fe3+ occupancy of tetrahedral sites. The techniques used were near infrared, Fe-K X-ray absorption near-edge and X-ray absorption ...
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(2004)Spatially resolved luminescence spectra from U(VI) co-precipitated at the (101̄4) growth surface of synthetic calcite single crystals confirm heterogeneous incorporation corresponding to the distribution of structurally ...
Now showing items 13823-13842 of 26297