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Статті в журналах з теми "Chrome Spinel"
Pownceby, M., and P. Bourne. "Detrital chrome-spinel grains in heavy-mineral sand deposits from southeast Africa." Mineralogical Magazine 70, no. 1 (February 2006): 51–64. http://dx.doi.org/10.1180/0026461067010312.
Повний текст джерелаAhmad, S., M. A. Rhamdhani, M. I. Pownceby, and W. J. Bruckard. "Exploratory Study of Separation of Sulphidised Chrome Spinels from Reduced Ilmenite." Minerals 12, no. 10 (September 30, 2022): 1252. http://dx.doi.org/10.3390/min12101252.
Повний текст джерелаPownceby, M. "Compositional and textural variation in detrital chrome-spinels from the Murray Basin, southeastern Australia." Mineralogical Magazine 69, no. 2 (April 2005): 191–204. http://dx.doi.org/10.1180/0026461056920246.
Повний текст джерелаALEKSEEV, Aleksandr Valer’evich, and Tat’yana Andreevna SHERENDO. "Composition, structure and magnetic properties of ore chrome spinels of the Klyuchevsky massif (Middle Urals)." NEWS of the Ural State Mining University 1, no. 1 (March 23, 2020): 73–85. http://dx.doi.org/10.21440/2307-2091-2020-1-73-85.
Повний текст джерелаMogessie, A., F. Purtscheller, and R. Tessadri. "Chromite and chrome spinel occurrences from metacarbonates of the Oetztal–Stubai Complex (Northern Tyrol, Austria)." Mineralogical Magazine 52, no. 365 (April 1988): 229–36. http://dx.doi.org/10.1180/minmag.1988.052.365.09.
Повний текст джерелаSEREBRIANNIKOV, ALEXEI, ALLA LOGVINOVA, and NIKOLAY SOBOLEV. "Specific features of the microimpurity composition of chrome-spinel inclusions in diamonds from kimberlites of Sakha-Yakutia." Domestic geology, no. 6 (January 10, 2023): 50–63. http://dx.doi.org/10.47765/0869-7175-2022-10034.
Повний текст джерелаLodha, Rahul, Carmen Oprea, Tom Troczynski, and George Oprea. "Sintering Studies on Magnesia-Rich Chromium-Free Spinel-Bonded Basic Refractories." Advances in Science and Technology 70 (October 2010): 108–13. http://dx.doi.org/10.4028/www.scientific.net/ast.70.108.
Повний текст джерелаFAUPL, P., A. PAVLOPOULOS, U. KLÖTZLI, and K. PETRAKAKIS. "On the provenance of mid-Cretaceous turbidites of the Pindos zone (Greece): implications from heavy mineral distribution, detrital zircon ages and chrome spinel chemistry." Geological Magazine 143, no. 3 (April 6, 2006): 329–42. http://dx.doi.org/10.1017/s001675680600197x.
Повний текст джерелаSherendo, Tatyana, Valentin Mitrofanov, Aleksey Vdovin, Petr Martyshko, Aleksey Alexeev, Dmitry Zamyatin, Vladimir Vazhenin, and Lidia Pamyatnykh. "Magnetic Clusters in Natural Ferro-Chromian Spinels." Solid State Phenomena 233-234 (July 2015): 587–90. http://dx.doi.org/10.4028/www.scientific.net/ssp.233-234.587.
Повний текст джерелаBLADES, MORGAN L., JOHN FODEN, ALAN S. COLLINS, TADESSE ALEMU, and GIRMA WOLDETINSAE. "The origin of the ultramafic rocks of the Tulu Dimtu Belt, western Ethiopia – do they represent remnants of the Mozambique Ocean?" Geological Magazine 156, no. 1 (October 30, 2017): 62–82. http://dx.doi.org/10.1017/s0016756817000802.
Повний текст джерелаДисертації з теми "Chrome Spinel"
Dare, Sarah Anne Sophia. "Chrome-spinel geochemistry of the northern Oman-United Arab Emirates ophiolite." Thesis, Cardiff University, 2007. http://orca.cf.ac.uk/54747/.
Повний текст джерелаTabit, Adelhalim. "Equilibre orthopyroxene-spinelle : etude experimentale et theorique, application aux roches issues du manteau superieur." Clermont-Ferrand 2, 1986. http://www.theses.fr/1986CLF21025.
Повний текст джерелаCornu, Lucile. "Matériaux X-Chromo-luminescents de type spinelle et elpasolite : relation structure-propriétés." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0082/document.
Повний текст джерелаResearch for luminescent materials sensitive to temperature or UV exposurevariation are increasing. Here we manage to synthesized and characterized materialswhich show such properties.First, spinel structure materials as ZnAl2O4 doped with manganesecompounds exhibit irreversible thermo-chromo-luminescence properties. Thismaterial shows a variation of emission wavelength from red to green with a variationof the thermal history of the sample. These variations are due to a modification of themanganese environment in the structure with the temperature. It was demonstratedthat the temperature range of the luminescence switch can be tuned by themodification of the matrix composition. Secondly, cerium-doped Rb2KInF6compounds with elpasolite structure exhibit reversible photo-chromo-luminescenceproperties. Under UV irradiation, new luminescent species (In+), created by redoxreaction between Ce3+ and In3+ species, and which emits in the red range, can beproduced. We demonstrate the reversibility of the phenomenon by UV irradiation orafter a thermal treatment. The specificity of these properties with this structure andthis composition can be explained by structural consideration: Ce3+ and In3+positioning in the cell allowing electronic exchanges between these ions thanks toorbital overlap
BENOIT, VINCENT. "Etat d'equilibre de peridotites du manteau superieur : application au plateau du colorado." Paris 7, 1987. http://www.theses.fr/1987PA077186.
Повний текст джерелаVerger, Louisiane. "Les oxydes de chrome dans les pigments et les décors de porcelaine." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066546/document.
Повний текст джерелаChromium oxides are widely used in the ceramic industry because they are characterized by a large variety of colors. At the French porcelain manufacture of Sèvres, their coloring properties have been explored since the discovery of chromium at the end of the 18th century. The researches initiated by Brongniart lead to a group of 76 pigments for porcelain composed of chromium oxides, regularly synthesized at the laboratory of the manufacture. An exhaustive study was done on these pigments, which enables to propose a classification based on their mineralogical analysis and highlights the role of Cr3+ in the color of the pigments, without Cr6+. The mixture of one or two pigments and an uncolored frit is applied on the porcelain, and fired at high temperature to obtain a glaze, i.e. a partly glassy decorative layer on the top of the porcelain. Pigments composed of chromium are used to obtain green, pink, greenish-blue, brown and black glazes. This thesis focuses on a particular pigment, mainly composed of gahnite doped with chromium ZnAl2O4:Cr3+. This kind of pigment was identified in a collection of artefacts produced by the manufacture between the end of the 19th century and the beginning of the 20th century. This period corresponds to the artistic movement Art Nouveau. The solid solution ZnAl2-xCrxO4 was studied to get the structural environment of Cr, showing the role of the second neighbor Cr in the color variation. During firing of the glaze, a mechanism of gradual dissolution of the initial grains of pigments was determined, resulting of reactions with the uncolored frit. Our work shows the low solubility of Cr in glass and its preferential speciation in crystals, leading to crystalline phase changes or modifications of composition along solid solutions during the thermal treatment at high temperature. These modifications enable to understand the origin of color in porcelain glazes and the mechanism of glaze formation
Juhin, Amélie. "Propriétés électroniques et structurales du chrome en impureté dans les cristaux : approche expérimentale et théorique." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2008. http://tel.archives-ouvertes.fr/tel-00340612.
Повний текст джерелаL'environnement structural relaxé autour du Cr a été déterminé pour le spinelle MgAl2O4:Cr3+ (rouge) et pour les grenats pyrope Mg3Al2Si3O12:Cr3+ (rouge) et grossulaire Ca3Al2Si3O12:Cr3+ (vert). La sphère de coordination du Cr est voisine de celle observée dans le pôle pur chromifère correspondant (MgCr2O4, Mg3Cr2Si3O12 et Ca3Cr2Si3O12, respectivement), du point de vue des distances interatomiques et de la symétrie locale. La variation de la distance moyenne Cr-O joue un rôle important dans celle du champ cristallin, mais ne permet pas d'expliquer à elle seule l'évolution du celui-ci au sein des solutions solides, entre les cristaux dilués et entre les cristaux concentrés. Nous montrons que la nature de la liaison Cr-O est un facteur important et que l'environnement à moyenne distance autour du chrome exerce une influence sur ses propriétés spectroscopiques. En particulier, les deuxièmes voisins ont un effet privilégié sur la distance Cr-O et la nature de cette liaison.
Bizi, Mohamed. "Propriétés optiques d'ions de métaux de transition (3D3 à 3D8) dans les oxydes spinelles et de verres sodocalciques." Rouen, 1989. http://www.theses.fr/1989ROUES035.
Повний текст джерелаMartinelli, Laure. "Mécanisme de corrosion de l' acier T91 par l' eutectique Pb-Bi utilisé comme matériau de cible de spallation : importance pour les réacteurs hybrides." Paris 6, 2005. http://www.theses.fr/2005PA066442.
Повний текст джерелаBlades, Morgan. "The age and origin of the western Ethiopian Shield." Thesis, 2013. http://hdl.handle.net/2440/83744.
Повний текст джерелаWestern Ethiopia is made up of a range of supra-crustal and plutonic rocks. The Precambrian exposures of the Western Ethiopian Shield are positioned within the juvenile Neoproterozoic crust of the Arabian Nubian Shield and the older, predominately gneissic Mozambique Belt (Woldemichael et al. 2010). The age and origin of the Western Ethiopian Shield are still largely unidentified. The aim of this paper is to constrain the age and origin of the sedimentary and igneous rocks within the Western Ethiopian Shield. This will be done using isotopic techniques. The detrital zircons have been analysed for U-Pb age (yielding maximum depositional ages and age provenance information) and Hf isotopes (to investigate the nature of zircons). Geochemical analysis on the Thermal Ionisation Mass Spectrometer (TIMS), Inductively Coupled Plasma Mass Spectromentry (ICP-MS) and microprobe has also been undertaken. One of the focuses is the examination of the volcanic and volcaniclastic successions, as well as, the geochemical nature of the ultra-mafic bodies in the Shield. The geochemistry of metavolcanic and meta-volcaniclastic data suggest that the origin of the volcanics formed in an arc-like setting. Relatively low niobium; however, suggest that the mantle source may have been more enriched than that seen in modern volcanic arcs. Detrital zircons, obtained from a meta-sandstone, yielded provenance age peaks at ~2499 Ma, ~1855 Ma and between 1100-800 Ma and a maximum depositional age of 838 ± 13 Ma. Hf Isotopes from the same zircons demonstrated that both the oldest and youngest populations have broadly juvenile Hf isotopic values however; ~1820 Ma age shows significantly evolved Hf isotopic values. A minimum age constraint on the deformation was provided by the U-Pb age of 572 .6 ± 7.6 Ma and yielded whole epsilon Nd values of 3.74 and epsilon Hf values of 6.79-7.98, demonstrating a juvenile origin. A significant aspect of the Arabian-Nubian Shield is the interpretation of the N-S oriented regional shear zones. Concentrically zoned mafic/ultramafic bodies, previously identified as remnants of the oceanic crust, are suggested to be Alaskan-type intrusions. Though chemically different to typical Alaskan-type intrusions these display a subduction affinity and have close associations to shear-zone hosted intrusions elsewhere in the Arabian Nubian Shield. Thus, they have been interpreted as being formed in similar supra subduction intrusive settings.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Earth and Environmental Sciences, 2013
Kessel, Ronit. "The Activity of Chromite in Multicomponent Spinels : An Experimental Study with Implications for the Metamorphic History of Equilibrated Ordinary Chondrites." Thesis, 2002. https://thesis.library.caltech.edu/6827/1/Kessel_r_2002.pdf.
Повний текст джерелаAn experimental technique for evaluating the activity of chromite in multicomponent spinels was developed by equilibrating the spinel of interest with a Pt-alloy under a controlled temperature and oxygen fugacity. The thermodynamic properties of the ternary Pt-Fe-Cr system was evaluated, such that activities of Cr and Fe in an equilibrated Pt-alloy can be used to calculate the activity of chromite in the spinel of interest.
The ternary activity model formulation used is based on the characterization of each bounding binary system, Pt-Fe, Pt-Cr, Fe-Cr, with the addition of ternary interaction terms. The Pt-Fe and Pt-Cr systems are described as asymmetric regular solutions with interaction parameters of W_(PtFe)=-138.0±3.3, W_(FePt)=-90.8±24.0, and W_(PtCr)=-129.1±1.2, W_(CrPt)=-80.9±4.4, and D_(PtCr)=+94.4±2.5 kJ/mol (1σ), respectively. Combined with literature thermodynamic properties for the Fe-Cr system, the ternary interaction parameters in the Pt-Fe-Cr system were found to be C_(Cr)=0, C_(Pt)=+ll5.7, and C_(Fe)=-68.6 kJ/mol.
Using this technique, the metamorphic history of equilibrated ordinary chondrites was evaluated by examining the compositions and textures of olivines, pyroxenes, spinels, and alloys. Equilibrium temperatures based on Fe-Mg exchange between olivine and spinel exhibit a range of 680-796°C in H, L, and LL ordinary chondrites spanning petrographic type 4 to 6. Type 4 chondrites in all groups record variable temperatures that are lower than or equal to those of types 5 and 6 chondrites, implying decoupling of metamorphic temperature from petrographic type. Cooling rates near 800°C were found to be 1-3 K/Ma, slow enough to allow continous re-equilibration of spinel grains from peak metamorphic temperatures to the olivine-spinel equilibration temperature.
The temperature-oxygen fugacity relationships in equilibrated H chondrites were constrained from spinel-alloy and olivine-pyroxene-alloy phase assemblages based on the mineral compositions and activity-composition models. Log_(10)f_(02) values based on the assemblage olivine-pyroxene-alloy are -1.75±0.02 log units below Iron-Wüstite (IW) buffer, regardless of petrographic type. The log_(10)f_(02) values calculated based on the spinel-alloy coexistence are at least ~1.5 log units more oxidizing than those based on the olivine-pyroxene-alloy if olivine-spinel equilibration temperatures (728-820°C) are assumed. This probably indicates that closure for spinel-alloy equilibria occurred under retrograde conditions at temperatures below 700°C.
Книги з теми "Chrome Spinel"
Roberts, William S. Bulk mineralogy and geochemistry of selected Alaskan chromian spinel samples. Pittsburgh, Pa: U.S. Dept. of the Interior, Bureau of Mines, 1985.
Знайти повний текст джерелаЧастини книг з теми "Chrome Spinel"
Baumgartner, Peter O. "Chrome Spinel and Clay Mineralogy." In Jurassic Sedimentary Evolution and Nappe Emplacement in the Argolis Peninsula (Peloponnesus, Greece), 97–100. Basel: Birkhäuser Basel, 1985. http://dx.doi.org/10.1007/978-3-0348-9319-0_7.
Повний текст джерелаMeng, Jinxia, Weiqing Chen, Jizeng Zhao, and Li Liu. "Study of the Synthesis of MgAl2O4 Spinel Refractory from Waste Chromium Slag of a Chrome Plant in China." In Energy Technology 2018, 341–55. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72362-4_30.
Повний текст джерелаKislov, Evgeniy V., Vadim S. Kamenetsky, Alexey V. Malyshev, and Vladislav V. Vanteev. "Concentrically-Zoned Mafic-Ultramafic Marinkin Massif, Middle Vitim Highland, Baikal Region, Russia: Inclusions in Chrome Spinel—Key to Mineral Formation Processes." In Springer Proceedings in Earth and Environmental Sciences, 111–18. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-49468-1_15.
Повний текст джерелаBarman, Junmoni, and S. Ravi. "Tunable Exchange Bias Behavior Near Room Temperature in Spinel Chromite." In Proceedings of 28th National Conference on Condensed Matter Physics, 49–56. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-5407-7_6.
Повний текст джерелаMartin, Ellinor, Birger Schmitz, Fredrik Terfelt, Luis Erick Aguirre-Palafox, and Walter Alvarez. "The micrometeorite flux in the Albian–Aptian age (ca. 103–117 Ma): A search for Tycho ejecta in pelagic sediments using chrome spinels." In From the Guajira Desert to the Apennines, and from Mediterranean Microplates to the Mexican Killer Asteroid: Honoring the Career of Walter Alvarez. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.2557(23).
Повний текст джерелаSchmitz, Birger, Martin Schmieder, Shiyong Liao, Ellinor Martin, and Fredrik Terfelt. "Impact-crater ages and micrometeorite paleofluxes compared: Evidence for the importance of ordinary chondrites in the flux of meteorites and asteroids to Earth over the past 500 million years." In From the Guajira Desert to the Apennines, and from Mediterranean Microplates to the Mexican Killer Asteroid: Honoring the Career of Walter Alvarez. Geological Society of America, 2022. http://dx.doi.org/10.1130/2022.2557(18).
Повний текст джерела"Chrome-spinels." In Rare Earth Elements in Ultramafic and Mafic Rocks and their Minerals, 89–100. CRC Press, 2012. http://dx.doi.org/10.1201/b11831-3.
Повний текст джерела"Chrome-spinels." In Rare Earth Elements in Ultramafic and Mafic Rocks and their Minerals, 99–110. CRC Press, 2012. http://dx.doi.org/10.1201/b11831-5.
Повний текст джерела"Distribution of chrome-spinel grains across the 3He anomaly of the Tortonian Stage at the Monte dei Corvi section, Italy." In 250 Million Years of Earth History in Central Italy: Celebrating 25 Years of the Geological Observatory of Coldigioco, 383–91. Geological Society of America, 2019. http://dx.doi.org/10.1130/2019.2542(21).
Повний текст джерелаSa\'ad ZA Kader, Al-Mashaikie. "Abnormal Ophiolite (Olivine/Pyroxene Rich) Sandstone NE Iraq: An Approach to the Origin and Tectonosedimentary Evolution of Zagros Foreland Basin." In New Insights in Sedimentary Rocks [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.108333.
Повний текст джерелаТези доповідей конференцій з теми "Chrome Spinel"
Tan, Taide, and Yitung Chen. "Formation and Protection of Fe-Cr Oxide Spinel During the Oxidation Process of Stainless Steels in LBE Environment." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12899.
Повний текст джерелаO’Toole, Stephen, and Nicholas Stevens. "High Temperature Diffusion of Oxygen in Chromite." In ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93582.
Повний текст джерелаGrimbergen, Michael, D. G. Nest, Keven Yu, T. Y. B. Leung, Madhavi Chandrachood, Alan Ouye, Saravjeet Singh, Ibrahim Ibrahim, Ajay Kumar, and David Graves. "Plasma characterization of Tetra III chrome etch system." In SPIE Photomask Technology, edited by Larry S. Zurbrick and M. Warren Montgomery. SPIE, 2009. http://dx.doi.org/10.1117/12.833490.
Повний текст джерелаSaveliev, Dmitry Evgenievich, Darkhan K. Makatov, and Vasily Sergeevich Portnov. "Solid inclusions in the chromitites of Geofizicheskoe-VII deposit (Kempirsay massif, Kazakhstan)." In Проблемы минералогии, петрографии и металлогении. Научные чтения памяти П. Н. Чирвинского. ПЕРМСКИЙ ГОСУДАРСТВЕННЫЙ НАЦИОНАЛЬНЫЙ ИССЛЕДОВАТЕЛЬСКИЙ УНИВЕРСИТЕТ, 2022. http://dx.doi.org/10.17072/chirvinsky.2022.219.
Повний текст джерелаGuan, Yabo, Harlan Bruner, Narayan Yoganandan, Frank A. Pintar, and Dennis J. Maiman. "Block-Fixation Finite Element Lumbar Spine Model to Examine Load-Sharing, Bone-Screw Interaction, and Stress in Carbon Fiber Reinforced PEEK Construct." In ASME 2009 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2009. http://dx.doi.org/10.1115/sbc2009-206654.
Повний текст джерелаKwon, Sung-Won, Dong-Chan Kim, Dong-Seok Nam, Sang-Gyun Woo, and Han-Ku Cho. "Plasma monitoring of chrome dry etching for mask making." In SPIE Photomask Technology, edited by M. Warren Montgomery and Wilhelm Maurer. SPIE, 2010. http://dx.doi.org/10.1117/12.866828.
Повний текст джерелаDufaye, Félix, Astrid Sippel, Mark Wylie, Edgardo García-Berríos, Charles Crawford, Carl Hess, Luca Sartelli, et al. "Inline detection of Chrome degradation on binary 193nm photomasks." In SPIE Photomask Technology, edited by Thomas B. Faure and Paul W. Ackmann. SPIE, 2013. http://dx.doi.org/10.1117/12.2029470.
Повний текст джерелаSim, Jeffrey, Tak-Seng Lai, Riza Bual, See Boon K. Tan, Aravinda Krishnappa, Derrick Wu, Xiaosong Zhang, Wooyong Kim, Chit-Wei Lee, and Peter Peng. "Predictive chrome-film haze mask management for mass production." In SPIE Advanced Lithography, edited by Christopher J. Raymond. SPIE, 2010. http://dx.doi.org/10.1117/12.855945.
Повний текст джерелаDanilenko, I. A., S. L. Votyakov, D. A. Zamyatin, and I. S. Chashchukhin. "Selection and verification of intralaboratory reference samples to assess Fe oxidation state in chrome spinels using electron probe microanalysis." In THE 2ND INTERNATIONAL CONFERENCE ON PHYSICAL INSTRUMENTATION AND ADVANCED MATERIALS 2019. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0036596.
Повний текст джерелаNing, Guoxiang, Selvi Gopalakrishnan, Thomas Thamm, Nikolay Oleynik, Paul Ackmann, Remi Riviere, Stephanie Maelzer, and Yee Mei Foong. "Alternative material to mitigate chrome degradation on high volume ArF layers." In SPIE Photomask Technology, edited by Thomas B. Faure and Paul W. Ackmann. SPIE, 2013. http://dx.doi.org/10.1117/12.2025466.
Повний текст джерелаЗвіти організацій з теми "Chrome Spinel"
Cogulu, E. H. Factors controlling postcumulus compositional changes of chrome-spinels in the Crystal Lake Intrusion, Thunder Bay, Ontario. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/192440.
Повний текст джерела