Relevant bibliographies by topics / Pyrites – Electric properties

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Pyrites – Electric properties'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Pyrites – Electric properties"

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Li, Yuqiong, Jianhua Chen, and Cuihua Zhao. "Influence of external electric field on the electronic structure and optical properties of pyrite." RSC Advances 7, no. 89 (2017): 56676–81. http://dx.doi.org/10.1039/c7ra10815j.

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Manning, Michael J., and Kumud A. Athavale. "Dielectric properties of pyrite samples at 1 100 MHz." GEOPHYSICS 51, no. 1 (1986): 172–82. http://dx.doi.org/10.1190/1.1442030.

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Pyrite occurs in many petroleum reservoirs and significantly affects density and electric well logs even in low concentrations. Ultrahigh‐frequency dielectric measurements also are significantly affected by pyrite. Dielectric properties of core samples containing approximately 50 percent pyrite by volume were measured from 800 to 1 200 MHz ([Formula: see text]). These measurements demonstrate the high, complex dielectric permittivity of pyrite and provide data for calculation of pyrite permittivity at ultrahigh frequencies. The measured complex‐permittivity of water‐saturated pyrite nodules is
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Gurung, S. R., R. B. Stewart, P. E. H. Gregg, and N. S. Bolan. "An assessment of requirements of neutralising materials of partially oxidised pyritic mine waste rock." Soil Research 38, no. 2 (2000): 329. http://dx.doi.org/10.1071/sr99049.

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The objective of this study was to assess the ameliorating properties of selected neutralising materials added to partially oxidised pyritic mine waste rock from Martha mine pitwall, Waihi, New Zealand.Chemical characterisation showed that the partially oxidised pyritic pitwall rock material had very low pH (<2.1), high electrical conductivity and elevated levels of Al, SO42–, Fe, Mn, and a total non-oxidised sulfide-S content of 2.6%. Acid-base accounting analysis of the material indicated that it had nil acid-neutralising capacity and a net acid-producing potential of 82 kg CaCO3/t. The s
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Степанов, Н. П., С. А. Немов, И. В. Свешников та ін. "Температурные зависимости коэффициента термоэдс, удельного сопротивления и теплопроводности электронного и дырочного пирита FeS-=SUB=-2-=/SUB=- в интервале 293-400 K". Физика и техника полупроводников 55, № 9 (2021): 826. http://dx.doi.org/10.21883/ftp.2021.09.51303.9667.

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Abstract The temperature dependences of the thermal EMF, the specific electrical conductivity, and the specific thermal conductivity of samples of natural pyrite FeS2, with electronic and hole-type conductivity, are studied in the temperature range of 293−400 K. The data obtained are in good agreement with the results of previous studies of the electrical properties of this mineral, established in the course of geophysical studies. Based on the results of the performed measurements, as well as taking into account the known data on the temperature behavior of the thermo-EMF and the specific ele
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Wang, Chen, and Lee D. Slater. "Extending accurate spectral induced polarization measurements into the kHz range: modelling and removal of errors from interactions between the parasitic capacitive coupling and the sample holder." Geophysical Journal International 218, no. 2 (2019): 895–912. http://dx.doi.org/10.1093/gji/ggz199.

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SUMMARY Spectral induced polarization (SIP), describing the measurement of the frequency domain electrical impedance magnitude and phase of porous materials, has been widely used to characterize subsurface hydrological/biogeochemical properties and processes. SIP data collected at frequencies higher than 100 Hz are expected to describe the polarization of small particles providing insights into the physicochemical properties of clays, nanoparticles and microorganisms. However, the phase measurements at these high frequencies are often contaminated by errors due to the parasitic capacitive coup
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SHESTAKOV, Aleksey Fedorovich. "To estimation of polarization characteristics of the medium on the data of multi-frequency measurements in the method alternating current resistance." NEWS of the Ural State Mining University 1 (March 15, 2021): 102–8. http://dx.doi.org/10.21440/2307-2091-2021-1-102-108.

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The relevance of the work is due to the need to extract additional information in the study of the polarization properties of the geological environment from experimental data in the method of ac resistance using multifrequency measurements. The introduction provides a brief review of the literature on the problem of studying the polarization properties of rocks in the frequency domain and the method of frequency dispersion, which is successfully used in prospecting and exploration works in sulfide and copper pyrite deposits. The questions of determining the polarizability of the medium in the
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Huang, Rong Qiang, and Yu Qiong Li. "DFT Study of the Effects of Co and Ni Impurities on the Properties of Pyrite Surface." Advanced Materials Research 1010-1012 (August 2014): 1581–84. http://dx.doi.org/10.4028/www.scientific.net/amr.1010-1012.1581.

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The Co- and Ni-bearing pyrite (100) surfaces were studied using density functional theory (DFT). The calculated results show that the covalency of the bonds on surface is weakened due to the presence of Co or Ni impurity, especially for the Ni-bearing pyrite surface. Hybridization occurs between Co 3d and S 3p and between Ni 3d and S 3p. The electrical conductivity of surface is enhanced due to the presence of Co and Ni impurities. Surface Co atom is predicted as spin-polarized and surface Ni atom is calculated as low-spin state.
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Chen, Huangye, and Zoya Heidari. "Pore-Scale Joint Evaluation of Dielectric Permittivity and Electrical Resistivity for Assessment of Hydrocarbon Saturation Using Numerical Simulations." SPE Journal 21, no. 06 (2016): 1930–42. http://dx.doi.org/10.2118/170973-pa.

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Summary Complex pore geometry and composition, as well as anisotropic behavior and heterogeneity, can affect physical properties of rocks such as electrical resistivity and dielectric permittivity. The aforementioned physical properties are used to estimate in-situ petrophysical properties of the formation such as hydrocarbon saturation. In the application of conventional methods for interpretation of electrical-resistivity (e.g., Archie's equation and the dual-water model) and dielectric-permittivity measurements [e.g., complex refractive index model (CRIM)], the impacts of complex pore struc
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Karguppikar, A. M., and A. G. Vedeshwar. "Transport properties of thin iron pyrite films." physica status solidi (a) 95, no. 2 (1986): 717–20. http://dx.doi.org/10.1002/pssa.2210950242.

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LIN, SHOEI-SHENG, JENG-KUANG HUANG, and YING-SHENG HUANG. "THE PHYSICAL PROPERTIES OF RuS2 − xSex SINGLE CRYSTALS." Modern Physics Letters B 07, no. 05 (1993): 271–90. http://dx.doi.org/10.1142/s0217984993000291.

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In this review, the preparation and characterization of the pyrite-type compound RuS 2 and RuSe 2, as well as the mixed anion compositions RuS 2 − x Se x, are systematically reported. Unusual temperature dependence in electrical transport properties characterize these compounds. Electrolyte electroreflectance measurements were used to get a better understanding of their band structure. Long-wavelength optical phonons have been studied by Raman scattering measurements at room temperature. The nature of defect in these compounds were studied by electron paramagnetic resonance (EPR) investigation
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Dissertations / Theses on the topic "Pyrites – Electric properties"

1

Li, Yanqing. "Electrochemical studies of pyrite and galena." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06102009-063129/.

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Shvarova, Olga Y. "The self-assembly of nucleic acid bases on metal and mineral surfaces." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:1658dcab-f1d4-4a7f-998c-7193bad088bf.

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The ability of RNA bases to self-assemble into larger structures is an important research area relevant to the origins of life. In the RNA helix the bases are arranged on a sugar-phosphate carcass but it has been suggested that the initial ordering could form on a flat surface. This thesis is an attempt to establish experimentally whether the complementary RNA bases, adenine and uracil, have the ability to self-assemble into large ordered structures when adsorbed on metal and mineral surfaces. The Au (111) surface was chosen as a preferred substrate as it is flat, relatively free of defects, c
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"Determining Carrier Mobilities in GaAs and Natural Pyrite Using Geometrical Magnetoresistance Measurement." Master's thesis, 2016. http://hdl.handle.net/2286/R.I.38786.

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abstract: Measurements of the geometrical magnetoresistance of a conventional semiconductor, gallium arsenide (GaAs), and a more recently developed semiconductor, iron pyrite (FeS2) were measured in the Corbino disc geometry as a function of magnetic field to determine the carrier mobility (μm). These results were compared with measurements of the Hall mobility (μH) made in the Van der Pauw configuration. The scattering coefficient (ξ), defined as the ratio between magnetoresistance and Hall mobility (μm/μH), was determined experimentally for GaAs and natural pyrite from 300 K to 4.2 K. The ef
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Books on the topic "Pyrites – Electric properties"

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1913-, Shilo Nikolaĭ Alekseevich, and Severo-Vostochnyĭ kompleksnyĭ nauchno-issledovatelʹskiĭ institut (Rossiĭskai͡a︡ akademii͡a︡ nauk), eds. Pirit zolotorudnykh mestorozhdeniĭ. Nauka, 1992.

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Book chapters on the topic "Pyrites – Electric properties"

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Fiechter, S., A. Hartmann, P. Dulski, D. Jokisch, and H. Tributsch. "Defect Chemistry and Electrical Properties of Iron-pyrite (FeS2–x)." In Non-Stoichiometry in Semiconductors. Elsevier, 1992. http://dx.doi.org/10.1016/b978-0-444-89355-0.50015-6.

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Conference papers on the topic "Pyrites – Electric properties"

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Han, T., M. B. Clennell, and M. Pervukhina. "Low-frequency Electrical Properties of Pyrite Sandstones." In 77th EAGE Conference and Exhibition 2015. EAGE Publications BV, 2015. http://dx.doi.org/10.3997/2214-4609.201412563.

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STÜCKL, A. C., R. WEIHRICH, and K. J. RANGE. "TOPOLOGICAL PROPERTIES AND ELECTRONIC STRUCTURES OF COMPOUNDS WITH PYRITE-TYPE CRYSTAL STRUCTURES." In Proceedings of the International Symposium on Solid State Chemistry in China. WORLD SCIENTIFIC, 2002. http://dx.doi.org/10.1142/9789812776846_0016.

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