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Browsing ELibrary by Title
Now showing items 2635-2654 of 21821
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(1988)Cryogenic superimposed haloes above buried mineral deposits are reliably identified by lithochemical, hydrochemical and biochemical sampling. The great practical importance of this phenomenon is not confined to geochemical ...
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(1998)The partitioning of fifteen trace elements (Rb, Sr, Zr, Nb, Ba, La, Ce, Nd, Sm, Gd, Yb, Hf, Ta, Pb, and Th) between clinopyroxene and synthetic melt has been studied in two compositions along an isotherm in the ...
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(2003)We have experimentally determined the partitioning of REE (rare earth elements) between zoisite and hydrous silicate melt at 1,100 °C and 3 GPa. All REE behave moderately compatible in zoisite with respect to the melt and ...
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(2004)Titanite is a common accessory mineral in silicocarbonatite from the Afrikanda alkaline-ultramafic complex, Kola Peninsula, Russia. In addition to large crystals (described elsewhere), this rock contains microscopic crystals ...
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CRYSTAL CHEMISTRY OF BASIC LEAD CARBONATES. I. CRYSTAL STRUCTURE OF SYNTHETIC SHANNONITE, PB2O(CO3) (2000)The crystal structure of synthetic shannonite, Pb2O(CO3), orthorhombic, P2(1)2(1)2(1), a = 5.1465(7), b = 9.014(1), c = 9.315(1) Angstrom, V = 432.12(10) Angstrom (3), Z = 4, has been solved by direct methods and refined ...
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(2000)The crystal structure of synthetic 'plumbonacrite', Pb5O(OH)(2)(CO3)(3), hexagonal, P6(3)cm, a = 9.0921(7), c = 24.923(3) Angstrom, V = 1784.3(3) Angstrom (3), Z = 6, has been solved by direct methods and refined to R = ...
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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 ...
Now showing items 2635-2654 of 21821