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Journal articles on the topic 'Copper silicates'

Author: Grafiati

Published: 4 June 2021

Last updated: 20 February 2023

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1

Titley, Spencer R. "Silicates flushed with copper." Nature 334, no. 6182 (August 1988): 472–73. http://dx.doi.org/10.1038/334472a0.

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2

Pan, Yuanming, and Michael E. Fleet. "Mineralogy and genesis of calc-silicates associated with Archean volcanogenic massive sulphide deposits at the Manitouwadge mining camp, Ontario." Canadian Journal of Earth Sciences 29, no. 7 (July 1, 1992): 1375–88. http://dx.doi.org/10.1139/e92-111.

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Skarn-like calc-silicate rocks are reported in spatial association with the Archean Cu–Zn–Ag massive sulphide deposits at the Manitouwadge mining camp, Ontario. Calc-silicates in the footwall of the Willroy mine occur as matrix to breccia fragments of garnetiferous quartzo-feldspathic gneiss and as lenses within garnetiferous quartzo-feldspathic gneiss and are composed of clinopyroxene, garnet, calcic amphiboles, wollastonite, plagioclase, K-feldspar, epidote, quartz, calcite, magnetite, and minor sulphides. Calc-silicates within the main orebody of the Geco mine are characterized by clinopyro

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3

Vítková, M., V. Ettler, Z. Johan, B. Kříbek, O. Šebek, and M. Mihaljevič. "Primary and secondary phases in copper-cobalt smelting slags from the Copperbelt Province, Zambia." Mineralogical Magazine 74, no. 4 (August 2010): 581–600. http://dx.doi.org/10.1180/minmag.2010.074.4.581.

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AbstractPyrometallurgical slags from three Cu-Co smelters (Nkana, Mufulira, Chambishi) in the Copperbelt Province, Zambia, were studied from mineralogical and chemical points of view. The slags were enriched in metals and metalloids, mainly Cu (up to 35 wt.%), Co (up to 2.4 wt.%) and As (up to 3650 ppm). The following primary phases were observed in slags: Ca-Fe silicates (clinopyroxene, olivine) and leucite, oxides (spinel-series phases), ubiquitous silicate glass and sulphide/metallic droplets of various sizes. The presence of glass and skeletal/dendritic crystal shapes indicated rapid cooli

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4

Ilton, Eugene S., and David R. Veblen. "Copper inclusions in sheet silicates from porphyry Cu deposits." Nature 334, no. 6182 (August 1988): 516–18. http://dx.doi.org/10.1038/334516a0.

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5

Tshilombo, Odilon M., and Tunde V. Ojumu. "Investigation of the Effect of pH Operating Conditions on Bioleaching of Low-Grade Chalcopyrite in Column Reactors." Advanced Materials Research 825 (October 2013): 401–5. http://dx.doi.org/10.4028/www.scientific.net/amr.825.401.

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Bioleaching of low-grade sulphide minerals is now an established process, with much interest in chalcopyrite. However few studies have been carried out on ores containing silicates gangue materials. Chalcopyrite has been reported to be refractory at ambient temperature. Several factors that influence bioleaching kinetics are well documented such as particle size, pH, temperature, galvanic interaction and microbial activity. The purpose of this research was to investigated the effect of pH as well as pre-leaching on bioleaching of silicate rich and low-grade chalcopyrite using mixed thermophili

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6

Cruz, Rosenira S. da, Juliana M. de S. e. Silva, Ulrich Arnold, Maurício S. Sercheli, and Ulf Schuchardt. "Copper Containing Silicates as Catalysts for Liquid Phase Cyclohexane Oxidation." Journal of the Brazilian Chemical Society 13, no. 2 (2002): 170–76. http://dx.doi.org/10.1590/s0103-50532002000200007.

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7

Karakassides, Michael A., Kostas G. Fournaris, Anastasios Travlos, and Dimitris Petridis. "The Synthesis of Mesoporous Copper Silicates Using Organofunctional Silicon Alkoxides." Advanced Materials 10, no. 6 (April 1998): 483–86. http://dx.doi.org/10.1002/(sici)1521-4095(199804)10:6<483::aid-adma483>3.0.co;2-m.

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8

Wang, Xiqu, Lumei Liu, and Allan J. Jacobson. "Nanoporous Copper Silicates with One-Dimensional 12-Ring Channel Systems." Angewandte Chemie International Edition 42, no. 18 (May 9, 2003): 2044–47. http://dx.doi.org/10.1002/anie.200351121.

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9

Stebbins, Jonathan F. "Toward the wider application of 29Si NMR spectroscopy to paramagnetic transition metal silicate minerals: Copper(II) silicates." American Mineralogist 102, no. 12 (December 1, 2017): 2406–14. http://dx.doi.org/10.2138/am-2017-6176.

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10

Henne, Anicia, Dave Craw, David Paterson, and Gordon Southam. "Textures and mineralogy of residual supergene copper silicates in oxidised overburden." Minerals Engineering 163 (March 2021): 106775. http://dx.doi.org/10.1016/j.mineng.2021.106775.

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11

Ganebnykh, E. V., A. V. Sviridov, V. V. Sviridov, S. S. Naboichenko, and G. I. Mal’tsev. "Recovery of copper from solutions by highly dispersed modified aluminum silicates." Russian Journal of Non-Ferrous Metals 57, no. 2 (March 2016): 81–84. http://dx.doi.org/10.3103/s106782121602005x.

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12

Lambert, U., and W. Eysel. "New Copper (II) — Rare Earth (III) Compounds II. Crystal Chemistry of CuLn2Ge2O8, CuLn2Si4O12 and CuLn2Ge4O12." Powder Diffraction 1, no. 3 (September 1986): 256–60. http://dx.doi.org/10.1017/s0885715600011799.

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AbstractTwenty seven new rare earth (Ln) compounds CuLn2 Ge2O8, CuLn2Ge4O12 and CuLn2Si4O12 have been synthesized. The powder diagrams were indexed and solid solutions of silicates and germanates were investigated. Structural variations with temperature, lanthanide contraction and Ge/Si substitution are described. Indications for second order phase transitions were found.

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13

Panova, Olena, Grigory Krasnyansky, and Irina Aznauryan. "EVALUATION OF ELECTROMAGNETIC RADIATION SHIELDING CHARACTERISTICS OF FACING BUILDING VATERIALS." Management of Development of Complex Systems, no. 48 (December 20, 2021): 152–59. http://dx.doi.org/10.32347/2412-9933.2021.48.152-159.

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The article presents the results of theoretical studies of the protective properties of composite facing materials based on a dielectric matrix with an electrically conductive non-magnetic filler in a wide frequency range of incident electromagnetic radiation. Expressions are got for the values of the transmission, reflection and absorption, and the electromagnetic radiation shielding efficiency calculated on their basis. The dependences of the permittivity and electrical conductivity of the composite on the volume fraction of the electrically conductive additive required for calculations were

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14

Stoulil, J., P. Šedá, M. Anisová, Z. Fencl, P. Novák, and J. Děd. "Defects of copper patina / Vady mìdìných patin." Koroze a ochrana materialu 59, no. 3 (November 1, 2015): 87–90. http://dx.doi.org/10.1515/kom-2015-0015.

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Abstract The paper is focused on analyses of dark copper patina defects that were formed on one sheet under the same conditions. Roofs of ten historical buildings were studied by image analysis and samples of two roofs were subjected to more detailed destructive analysis. These samples were studied by means of scanning electron microscopy with energy dispersive X-ray spectroscopy, X-ray diffraction and infrared spectroscopy. Both types of patina are composed of brochantite. Green patinas consisted of a pure brochantite and they had a fl at and compact surface. Conversely, black patina containe

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15

Kou, M. R. Sun. "Naturally-Occurring Silicates as Carriers for Copper Catalysts Used in Methanol Conversion." Clays and Clay Minerals 40, no. 2 (1992): 167–74. http://dx.doi.org/10.1346/ccmn.1992.0400205.

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16

Chen, Weibo, Yeqi Shi, Zhi Chen, Xiangwen Sang, Shuhong Zheng, Xiaofeng Liu, and Jianrong Qiu. "Near-Infrared Emission and Photon Energy Upconversion of Two-Dimensional Copper Silicates." Journal of Physical Chemistry C 119, no. 35 (August 20, 2015): 20571–77. http://dx.doi.org/10.1021/acs.jpcc.5b04819.

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17

Chanquía, Corina M., Leandro Andrini, Julio D. Fernández, Mónica E. Crivello, Félix G. Requejo, Eduardo R. Herrero, and Griselda A. Eimer. "Speciation of Copper in Spherical Mesoporous Silicates: From the Microscale to Angstrom." Journal of Physical Chemistry C 114, no. 28 (June 24, 2010): 12221–29. http://dx.doi.org/10.1021/jp102622v.

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18

Araujo, A. C. P. C. de, and M. G. Cavalcante. "Effect of divalent chloride salts on lamellar silica conductivity." Cerâmica 59, no. 352 (December 2013): 588–91. http://dx.doi.org/10.1590/s0366-69132013000400015.

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Silica is an important raw material in the production of soluble silicates, silicon and its derivatives: silicon carbide and silicone, which are converted into the lamellar form using the sol-gel process. This compound, which has been extensively studied because it is structurally organized, can be used for selective adsorption of toxic substances or immobilization of photo-active species. Impedance spectroscopy was used in a study of the electrical properties of lamellar silica doped with the following metal salts: nickel chloride, manganese chloride, and copper chloride, in order to observe

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19

Lonzinger, Tatiana M., Vadim A. Skotnikov, and Alexey M. Sukharev. "Study of the Process of Heavy Metals Cations Mineralization by Poly-Component Structures Based on Calcium and Magnesium Silicates." Materials Science Forum 989 (May 2020): 103–9. http://dx.doi.org/10.4028/www.scientific.net/msf.989.103.

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In order to achieve the goal of absorption of environmental pollutants, poly-component materials based on magnesium and calcium silicates - metal cations mineralizers – have been synthesized. The study of the processes of mineralization was carried out using model solutions containing soluble sulphates of copper, zinc, manganese and iron. The studies carried out have shown that the synthesized mineralizer based on calcium and magnesium silicates has a multicomponent structure with active electrochemically inhomogeneous centres on its surface as a result of breaking the Ca-O-Si, Mg-O-Si bonds,

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20

McKenzie, William F., and Harold C. Helgeson. "Phase relations among silicates, copper iron sulfides, and aqueous solutions at magmatic temperatures." Economic Geology 80, no. 7 (November 1, 1985): 1965–73. http://dx.doi.org/10.2113/gsecongeo.80.7.1965.

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21

Stuckey, Jason W., Jovan Livada, and Carmen Enid Martínez. "Structural charge location dictates speciation and lability of copper in swelling layer silicates." Applied Clay Science 216 (January 2022): 106332. http://dx.doi.org/10.1016/j.clay.2021.106332.

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22

Rumsey, M. S., M. D. Welch, A. R. Kampf, and J. Spratt. "Diegogattaite, Na2CaCu2Si8O20·H2O: a new nanoporous copper sheet silicate from Wessels Mine, Kalahari Manganese Fields, Republic of South Africa." Mineralogical Magazine 77, no. 8 (December 2013): 3155–62. http://dx.doi.org/10.1180/minmag.2013.077.8.09.

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AbstractDiegogattaite (IMA2012-096), Na2CaCu2Si8O20·H2O, is a new mineral from the Wessels mine in the Kalahari manganese fields of South Africa. It occurs as a minor phase with other copper-bearing silicates, Cu-rich pectolite, sugilite, quartz, aegirine and undifferentiated Fe-Mn oxides. Diegogattaite is pale turquoise through teal blue. It is found as sub-mm sized grains in a main crystalline patch 3–4 mm in size, and is currently known from only one sample. The mineral is transparent with a vitreous lustre and may have a good cleavage on {001}. It is brittle, with an uneven fracture and a

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23

Balassone, Giuseppina, Carmela Petti, Nicola Mondillo, Taras L. Panikorovskii, Roberto de Gennaro, Piergiulio Cappelletti, Angela Altomare, Nicola Corriero, Maria Cangiano, and Loredana D’Orazio. "Copper Minerals at Vesuvius Volcano (Southern Italy): A Mineralogical Review." Minerals 9, no. 12 (November 26, 2019): 730. http://dx.doi.org/10.3390/min9120730.

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This work is part of a project focused on the Somma–Vesuvius volcano and aimed at identifying Cu minerals related to mineralizing processes associated with magmatic activity in an active magmatic-hydrothermal system. A mineralogical survey was carried out on a set of samples represented by sublimates and fumarolic products from the collection of the Mineralogical Museum of the University of Naples Federico II (Italy). These samples are mainly related to most recent eruptive episodes of Vesuvius activity, from 1631 onward. Copper-bearing minerals were characterized, as well as associated minera

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24

Einaudi, Marco T. "Phase relations among silicates, copper iron sulfides, and aqueous solutions at magmatic temperatures; discussion." Economic Geology 82, no. 2 (April 1, 1987): 497–501. http://dx.doi.org/10.2113/gsecongeo.82.2.497.

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25

McKenzie, William F., and Harold C. Helgeson. "Phase relations among silicates, copper iron sulfides, and aqueous solutions at magmatic temperatures; reply." Economic Geology 82, no. 2 (April 1, 1987): 501–2. http://dx.doi.org/10.2113/gsecongeo.82.2.501.

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26

Fang, Weijun, Chaofa Xu Chaofa Xu, Jun Zheng, Guangjun Chen, and Kong Jiang. "Fabrication of Cu–Ag bimetal nanotube-based copper silicates for enhancement of antibacterial activities." RSC Advances 5, no. 49 (2015): 39612–19. http://dx.doi.org/10.1039/c5ra06065f.

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27

Jose, Sheethu, and Mundlapudi Lakshmipathi Reddy. "Lanthanum–strontium copper silicates as intense blue inorganic pigments with high near-infrared reflectance." Dyes and Pigments 98, no. 3 (September 2013): 540–46. http://dx.doi.org/10.1016/j.dyepig.2013.04.013.

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28

Sharygin, Victor, Vadim Kamenetsky, Liudmila Zhitova, Alexander Belousov, and Adam Abersteiner. "Copper-Containing Magnesioferrite in Vesicular Trachyandesite in a Lava Tube from the 2012–2013 Eruption of the Tolbachik Volcano, Kamchatka, Russia." Minerals 8, no. 11 (November 8, 2018): 514. http://dx.doi.org/10.3390/min8110514.

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Cu-rich magnesioferrite was found in vesicular basaltic trachyandesite in one of lava tubes (Duplex) that formed during the 2012–2013 eruption of the Tolbachik volcano, Kamchatka. This mineral is commonly associated with hematite, tenorite, halite, sylvite, and Ca-rich silicates (mainly, esseneite and Na-rich melilite) in high-temperature (800–1000 °C) reactionary zones (up to 100 µm) covering vesicular rocks and lava stalactites in the Duplex tube. The mineral relationships of this assemblage indicate the following crystallization sequence: Ca-rich silicates + hematite → Cu-rich magnesioferri

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29

Castillo, Hengels, Thomas Droguett, Mario Vesely, Pamela Garrido, and Sergio Palma. "Simple Compressive Strength Results of Sodium-Hydroxide- and Sodium-Silicate-Activated Copper Flotation Tailing Geopolymers." Applied Sciences 12, no. 12 (June 9, 2022): 5876. http://dx.doi.org/10.3390/app12125876.

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Geopolymers are created by mixing a source of aluminosilicates, which can be natural or by-products of other industries, with an alkaline solution, which dissolves the aluminates and silicates present in this source, where after a polymerization process, an N-A-S-H gel is formed, which is responsible for providing the properties that characterize geopolymers. Among the variety of existing geopolymers, those based on by-products from other industries stand out since they were demonstrated to be a less-polluting alternative for concrete production than ordinary Portland cement (OPC). Due to the

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30

Neves, Patrícia, Anabela A. Valente, and Zhi Lin. "Mild Liquid Phase Oxidation of Benzyl Alcohol in the Presence of Microporous Framework Copper Silicates." European Journal of Inorganic Chemistry 2020, no. 13 (February 28, 2020): 1172–76. http://dx.doi.org/10.1002/ejic.201901349.

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31

Wu, Shang-Feng, Yun-Jie Lai, Zeng-Yei Hseu, and Yaw-Terng Chern. "Evaluation of Land Use Adaptation by Sequential Extraction of Soil Trace Elements at an Abandoned Gold and Copper Refinery Site in Northern Taiwan." Sustainability 14, no. 11 (May 24, 2022): 6423. http://dx.doi.org/10.3390/su14116423.

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This study site is located at an abandoned factory of mining, smelting, and refining of gold and copper in north Taiwan for more than one hundred years. The present study used soil background investigation out of the site and the sequential extraction procedures for arsenic and copper to assess the reutilization potential of brownfields at the site. The upper limit of background concentration out of the site was 300 mg/kg for arsenic and 700 mg/kg for copper. The soil arsenic within the site was mainly in the immobile fraction, such as forms fixed by layer silicates, that were very low risk fo

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32

Kostin, Aleksey. "Mineralization in the andesitic lava from Kildyam volcanic complex, central Yakutia, Russia." IOP Conference Series: Earth and Environmental Science 906, no. 1 (November 1, 2021): 012006. http://dx.doi.org/10.1088/1755-1315/906/1/012006.

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Abstract This contribution presents the first detailed analysis of a new volcanic succession of olivine-pyroxenites, andesite, and dacite discovered in the Kildyam Late Jurassic complex in Central Yakutia. Petrographic and microprobe studies confirmed the liquid immiscibility in silicate melts during crystallization. Immiscible liquids are preserved as globules of one glass in another in andesites and as melted inclusions of native iron in matrix, clinopyroxene and plagioclase phenocrysts. Our analyses reveal the complex textural relationships between silicates and Fe-oxides, native iron and (

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33

Dubovina, Milos, Nenad Grba, Dejan Krcmar, Jasmina Agbaba, Srdjan Roncevic, Djurdja Kerkez, and Bozo Dalmacija. "Characterization of landfill deposited sediment from dredging process during different maturation stages." Journal of the Serbian Chemical Society 87, no. 1 (2022): 133–44. http://dx.doi.org/10.2298/jsc210830102d.

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A long-term monitoring of deposited sediment in the environment is considered in order to examine the mechanism of incorporation of Cu and Cd into mineral fractions and to investigate their bioavailability during landfill maturation. Using the sequential extraction technique (Community Bureau of Reference, BCR), the dominant presence of Cu and Cd in the oxidation and residual fraction was determined, which suggests a low risk of bioavailability of these metals in the environment. The maturation of the deposited sediment indicates that the Cu and Cd content decreases over time in the exchangeab

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34

Kontonikas-Charos, Alkis, Cristiana L. Ciobanu, Nigel J. Cook, Kathy Ehrig, Roniza Ismail, Sasha Krneta, and Animesh Basak. "Feldspar mineralogy and rare-earth element (re)mobilization in iron-oxide copper gold systems from South Australia: a nanoscale study." Mineralogical Magazine 82, S1 (February 28, 2018): S173—S197. http://dx.doi.org/10.1180/minmag.2017.081.040.

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ABSTRACTNanoscale characterization (TEM on FIB-SEM-prepared foils) was undertaken on feldspars undergoing transformation from early post-magmatic (deuteric) to hydrothermal stages in granites hosting the Olympic Dam Cu-U-Au-Ag deposit, and from the Cu-Au skarn at Hillside within the same iron-oxide copper-gold (IOCG) province, South Australia. These include complex perthitic textures, anomalously Ba-, Fe-, or REE-rich compositions, and REE-flourocarbonate + molybdenite assemblages which pseudomorph pre-existing feldspars. Epitaxial orientations between cryptoperthite (magmatic), patch perthite

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35

Ren, Yanping, Ruiyu Ding, Hairong Yue, Siyang Tang, Changjun Liu, Jinbo Zhao, Wen Lin, and Bin Liang. "Amine-grafted mesoporous copper silicates as recyclable solid amine sorbents for post-combustion CO 2 capture." Applied Energy 198 (July 2017): 250–60. http://dx.doi.org/10.1016/j.apenergy.2017.04.044.

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36

Chanquía, Corina M., Analía L. Cánepa, Julián Bazán-Aguirre, Karim Sapag, Enrique Rodríguez-Castellón, Patricio Reyes, Eduardo R. Herrero, Sandra G. Casuscelli, and Griselda A. Eimer. "Copper-containing spherical mesoporous silicates prepared by template-ion exchange: A multitechnique characterization and oxidation properties." Microporous and Mesoporous Materials 151 (March 2012): 2–12. http://dx.doi.org/10.1016/j.micromeso.2011.07.001.

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37

Koud, Jean-Mathias. "Genèse et évolution des silicates de cuivre dans le gisement de Mindouli au Congo. / Genesis and evolution of copper silicates in the ore deposit of Mindouli, Congo." Sciences Géologiques. Bulletin 41, no. 3 (1988): 279–88. http://dx.doi.org/10.3406/sgeol.1988.1799.

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38

SHESTAKOV, N. I., A. V. KORSHUNOV, and S. V. PUTILIN. "PROSPECTS FOR THE APPLICATION OF COPPER MELTING SLAG IN ROAD CONSTRUCTION." Building and reconstruction 98, no. 6 (2021): 90–97. http://dx.doi.org/10.33979/2073-7416-2021-98-6-90-97.

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The article discusses the option of strengthening the soils of the roadbed of highways with complex binders based on granular slag of copper smelting production and air lime. The characteristics of the investigated slag, photomicrographs of its surface, as well as the chemical and phase compositions are presented. A detailed description of the X-ray diffractogram of the studied slag with the processing of the obtained reflections using the ICDD PDF-2 database is presented. Calculations of hydrolytic equilibria were carried out using the main phases found from the data of X-ray phase analysis.

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39

Marinho-Reis, Amélia P., Cristiana Costa, Fernando Rocha, Mark Cave, Joanna Wragg, Teresa Valente, Amália Sequeira-Braga, and Yves Noack. "Biogeochemistry of Household Dust Samples Collected from Private Homes of a Portuguese Industrial City." Geosciences 10, no. 10 (October 1, 2020): 392. http://dx.doi.org/10.3390/geosciences10100392.

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The main objectives of the present study were to (i) investigate the effects of mineralogy and solid-phase distribution on element bioaccessibility and (ii) perform a risk assessment to calculate the risks to human health via the ingestion pathway. Multiple discriminant analysis showed that the dust chemistry discriminates between indoor and outdoor samples. The solid-phase distribution of the elements in indoor dust indicated that a large proportion of zinc, nickel, lead, copper, and cobalt is associated with an aluminum oxy-hydroxides component, formed by the weathering of aluminum silicates

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40

Popovic, Aleksandar, and Dragana Djordjevic. "Speciation of selected trace and major elements in lignite used in "Nikola Tesla A" power plant (Obrenovac, Serbia)." Journal of the Serbian Chemical Society 70, no. 12 (2005): 1497–513. http://dx.doi.org/10.2298/jsc0512497p.

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Four samples of milled lignite used in the "Nikola Tesla A" power plant located in Obrenovac near Belgrade, were subjected to a five-step sequential extraction, comprising of the following phases: distilled water, 1M ammonium acetate, 0.2M ammonium oxalate/0.2M oxalic acid, acidic solution of H2O2and a 6M solution of HCl. The concentrations of the different elements obtained in the extractions were statistically analyzed. The majority of the examined elements were found to be most probably associated with inorganic fractions of lignite, only aluminum, silicon, chromium and arsenic have a large

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41

Karimova, L. M., and Y. T. Kairalapov. "Percolation leaching of clay mixed copper ores." iPolytech Journal 26, no. 1 (April 5, 2022): 142–53. http://dx.doi.org/10.21285/1814-3520-2022-1-142-153.

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The present work addresses the problem of improving the percolation properties of heap leaching piles of clay, slime-oxidised and mixed ores. These ores are prone to colmatation, which hinders percolation of the solution through the ore layer. Laboratory tests on percolation leaching were carried out using a 2 m column having an internal diameter of 190 mm, loaded with 89.42 kg of ore material having a grain size of -55+0 mm. In order to eliminate colmatation, the ore layer was divided into two equal parts by a drainage layer of polystyrene foam. The research object was ore material extracted

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42

Kłonkowski, Andrzej M., Beata Grobelna, Teresa Widernik, Anna Jankowska-Frydel, and Włodzimierz Mozgawa. "The Coordination State of Copper(II) Complexes Anchored and Grafted onto the Surface of Organically Modified Silicates†." Langmuir 15, no. 18 (August 1999): 5814–19. http://dx.doi.org/10.1021/la981256+.

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43

Hinokuma, Satoshi, Saaya Kiritoshi, Yusuke Kawabata, Kento Araki, Shun Matsuki, Tetsuya Sato, and Masato Machida. "Catalytic ammonia combustion properties and operando characterization of copper oxides supported on aluminum silicates and silicon oxides." Journal of Catalysis 361 (May 2018): 267–77. http://dx.doi.org/10.1016/j.jcat.2018.03.008.

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44

Zhang, Yanshuang, Yubai Zhang, Xinqiao Zhao, and Yujun Zhang. "Sol–gel synthesis and properties of europium–strontium copper silicates blue pigments with high near-infrared reflectance." Dyes and Pigments 131 (August 2016): 154–59. http://dx.doi.org/10.1016/j.dyepig.2016.04.011.

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45

Thomas, Mark. "Understanding gangue acid consumption in copper sulfide heap leaching: Predicting the impact of carbonates, silicates and secondary precipitates." Minerals Engineering 171 (September 2021): 107090. http://dx.doi.org/10.1016/j.mineng.2021.107090.

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Kazin, Pavel E., Mikhail A. Zykin, Olga R. Gazizova, and Yury D. Tretyakov. "Introduction of Copper Ions in the Hexagonal Channels of the Apatite Type La-Sr and La-Ca Silicates." Zeitschrift für anorganische und allgemeine Chemie 635, no. 12 (October 2009): 2072–76. http://dx.doi.org/10.1002/zaac.200900209.

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Lam, Elizabeth J., Vicente Zetola, Yendery Ramírez, Ítalo L. Montofré, and Franco Pereira. "Making Paving Stones from Copper Mine Tailings as Aggregates." International Journal of Environmental Research and Public Health 17, no. 7 (April 3, 2020): 2448. http://dx.doi.org/10.3390/ijerph17072448.

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Copper mining, the central axis of Chile’s economic development, produces a large number of tailings, which become a potential environmental risk. This study aims to evaluate the mechanical properties resulting from the making of Portland cement mixtures with tailings as aggregates so that they can be eventually used in paving stones for building inactive tailings dams. Tailings coming from two dams at a concentration plant located in Taltal (Chile) were used. Currently, Dam 1 is inactive, while Dam 2 is active. The tailings samples obtained from both dams were granulometrically characterized

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Pekov, Igor V., Natalia V. Zubkova, and Dmitry Yu Pushcharovsky. "Copper minerals from volcanic exhalations – a unique family of natural compounds: crystal-chemical review." Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 74, no. 6 (December 1, 2018): 502–18. http://dx.doi.org/10.1107/s2052520618014403.

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The crystal-chemical characterization of oxysalts (sulfates, arsenates, vanadates, selenites, silicates, molybdates and borates), chlorides and oxides with species-defining Cu2+ formed in volcanic fumaroles (96 minerals representing 80 structure types; 81 species are endemic to fumarolic formation) is given. Copper minerals are known only from oxidizing-type fumaroles. The most diverse copper mineralization occurs at the Tolbachik volcano (Kamchatka, Russia). Copper minerals from fumarolic systems are subdivided into two genetic groups: Group I are minerals formed in the hot zones of fumaroles

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Costa, Leonor, Margarida Nunes, Sónia Costa, Milene Trindade, Catarina Miguel, and Teresa Ferreira. "Unveiling the Ambrotype: Characterization of Two 19th Century Photographs." Microscopy and Microanalysis 25, no. 1 (August 2, 2018): 203–13. http://dx.doi.org/10.1017/s1431927618000429.

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AbstractThis work used a multi-analytical approach to characterize two 19th century ambrotypes and was motivated by the lack of insight on these historical objects. Photographic imaging and optical microscopy (OM) were used to identify abrasions, cracks related to reticulation, tarnishing, and other aspects associated to production and degradation processes. With variable pressure scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (EDS) these processes were seen with great detail and further characterized. Elemental point analysis and elemental mapping showed that t

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Song, In Gu, Christopher Timmons, Galit Levitin, and Dennis W. Hess. "Photoresist Removal Using Alternative Chemistries and Pressures." Solid State Phenomena 145-146 (January 2009): 303–10. http://dx.doi.org/10.4028/www.scientific.net/ssp.145-146.303.

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Approximately 20% of the processing steps in integrated circuit (IC) fabrication involve surface cleaning and removal of photoresist and plasma etch residues. Continuous device minimization requires the use of thin films (<20 nm), closely spaced features, and ultra shallow junctions (<50nm); as a result, the challenges associated with effective surface cleaning are intensified. In addition, to insure high device performance, incorporation of alternate materials such as copper, ruthenium, and molybdenum, porous low dielectric constant SiO2-based insulators, and hafnium or zirconium oxides

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