Tourmaline 2017
نویسندگان
چکیده
منابع مشابه
Electroelastic Effect in Tourmaline
für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...
متن کاملAnharmonic thermal vibrations and disorder of atoms in tourmaline
Elbaite (space group R3m), a Li-bearing tounnaline with general fonnula of XY3Z"(B03hSi,,0,,W4, has 5 kinds of cations and 8 kinds 01'0 (including W). Of the structural studies of tourmaline, those of Gabrielle Donnay and hcr group were unique in focusing on the structural aspccts ofthc primary pyroelectricity (Donnay, 1977" etc). Donnay (1977) refined the structure of elbaite, and tound that t...
متن کاملQuartz-Tourmaline Veins in the Northern Sierra Nevada Area
Tourmaline-bearing quartz veins and replacement deposits, commonly copperand gold-bearing, are found in unusual concentration in northwestern Nevada and adjacent northeastern California in Triassic and Jurassic arc rocks and in the Cretaceous plutons that intrude them. Mines and prospects that exploit the tourmaline-bearing deposits are found in a zone approximately 70 miles long and 50 miles w...
متن کاملTowards Zn-dominant Tourmaline: a Case of Zn-rich
Tourmalines are a group of minerals which may concentrate various accessory 16 components, e.g. Cu, Ni, Zn, Bi, Ti, Sn. The paper presents fluor-elbaite and elbaite from a dyke of 17 the Julianna pegmatitic system at Piława Górna, at the NE margin of the Bohemian Massif, SW 18 Poland, containing up to 6.32 and 7.37 wt.% ZnO, respectively. Such high amounts of ZnO are 19 almost two times higher ...
متن کاملTransmission electron microscopy of muscovite alteration of tourmaline
Partially sericitized tourmaline from a pegmatite was investigated using high-resolution transmission electron microscopy (HRTEM). Fine-grained muscovite crystals form extensive narrow veinlets preferentially developed along the {110} and {100} cleavages of tourmaline, indicating that a cleavage-controlled alteration mechanism was dominant. HRTEM images show that tourmaline-muscovite interfaces...
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ژورنال
عنوان ژورنال: Elements
سال: 2017
ISSN: 1811-5217,1811-5209
DOI: 10.2138/gselements.13.4.284