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Browsing Геология России by Title
Now showing items 3385-3404 of 39126
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(2000)The crystal structures of synthetic Pb3O2(CO3) and NaPb2(OH)(CO3)(2), have been solved by direct methods and refined to R = 0.062 and 0.024, respectively. Pb3O2(CO3) is orthorhombic, Pnma, a 22.194(3), b = 9.108(1), c = ...
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(1988)A sizable fraction of hydrothermally altered sedimentary rocks, surrounding ore bodies in pyritic copper and polymetallic deposits of the Rudnyy Altai, consists of shaly chloritic rocks, which usually are homogeneous and ...
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(2001)Cr-spinel from the Imandra layered pluton was studied by a variety of methods including mineralogical and petrographic investigations, microprobe, infrared (IR) spectroscopy, XRD, and Mössbauer spectroscopy on 57Fe nuclei. ...
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(2002)Eleven clinopyroxenes from the Sludyanka Crystalline Complex in Russia belonging to the ternary join crystal diffractometry and electron probe microanalysis. The crystal chemical data show that the T site is almost completely ...
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(2003)Cell dimensions and solvus properties of Fe-containing sphalerites, depending on temperature and sulfur fugacity, were investigated using equilibrated powdered materials synthesized from elements and binary sulfides under ...
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(2003)Fifteen samples of (Mg,Fe)SiO3 majorite with varying Fe/Mg composition and one sample of (Mg,Fe)(Si,Al)O3 majorite were synthesized at high pressure and temperature under different conditions of oxygen fugacity using a ...
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(1999)Crystals of BaSi4O9 synthesized at 4 GPa and 1000 degrees C were determined to be isostructural with barium tetragermanate [trigonal, space group P3, a = 11.2469(11) and c = 4.4851(6) Aa, V = 491.3(1) Aa 3 ]. The structure ...
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(2001)The crystal structure of synthetic damaraite, Pb3O2(OH)CI (orthorhombic, Pmc2(1), a = 5.8052(7), b = 6.9025(8), c = 15.141(2) Angstrom, V= 606.7(1) Angstrom (3)) has been solved by direct methods and refined to R1 = 0.039. ...
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(2002)The crystal structure of Pb7O4(OH)(4)Cl-2 (monoclinic, C112(i), a=5.791(2), b=12.998(4), c=19.330(6) Angstrom, gamma=90.089(3)degrees, V=1455.1(8) Angstrom(3)) has been solved by direct methods and refined to R1=0.061 using ...
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(1999)High-temperature X-ray diffractometry was used to study linarite found in association with tenorite, atacamite, chrysocolla, and anglesite in the remnants of an old fumarolic field on Gora-1004 Volcano in the Tolbachik ...
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(1998)Phengitic muscovite-2M 1 crystals [ (super [12]) (K (sub 0.88-0.99) Na (sub 0.01-0.09) Ca (sub 0.00-0.06) Ba (sub 0.00-0.01) ) (super [6]) (Al (sub 1.64-1.88) Fe (super 2+) (sub 0.06-0.29) Fe (super 3+) (sub 0.01-0.16) Mg ...
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(1983)Comparative electron microprobe study of owyheeite from thirteen ore deposits shows significant variations in the concentration of major elements. These can be correlated with the chemical composition of the associated ...
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(2004)A comprehensive critical review of the phase fields, metastable modifications, solid solution ranges and phase transitions of monazite- and zircon-type REEXO4 (X = P,As, V) compounds is given. Monazite-type REEPO4 compounds ...
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(2003)A suite of vanadian magnesiochromites from the Sludyanka metamorphic complex (South Lake Baikal, Russia) were investigated by means of X-ray single-crystal structural refinements and microprobe analyses. Various morphological ...
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(2001)The crandallite, beudantite and alunite (jarosite) mineral groups are reviewed, with an emphasis on the evaluation of their suitability as storage materials for toxic metals. New data on the highly flexible crystal chemistry, ...
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(2004)Five Cr-dravite-chromdravite samples, representative of the high-chromium part of the compositional field observed in tourmalines occurring in rocks surrounding Lake Baikal, were selected and studied by electron microprobe ...
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(2005)The crystal-chemistry of 13 elbaite-schorl tourmaline crystals from the Cruzeiro pegmatite (Minas Gerais, Brazil) was studied with a multi-analytical approach (SREF, EMPA, SIMS, MS). Effective cation radii at the Y and Z ...
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(2003)The minerals of the rosenbuschite group are sorosilicates composed of a framework of 6-to 8-corner polyhedra and rows of Si 2 O 7 dimers. The polyhedra combine into layers (O layers) and into ribbons by edge sharing. ...
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(2004)Nineteen tourmaline samples of various provenances and geological settings were studied by EMPA, SREF and MS to represent the schorl-dravite compositional field. All samples belong to the Alkali group (except one with an ...
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(2003)Tremolite-tschermakite solid solutions have been synthesized between 700 and 850 °C and 200 and 2000 MPa. The starting materials were oxide-hydroxide mixtures and an additional 0.1-1.8 molal CaBr2 solution. The run products ...
Now showing items 3385-3404 of 39126