Very-low-grade phyllosilicates in the Aravis massif (Haute-Savoie, France) and the di-trioctahedral substitution in chlorite [PDF]
European Journal of Mineralogy, 2023 Very-low-grade mineral veins investigated in the impure limestone massif of the Aravis (Haute-Savoie, France) yielded a rich mineral assemblage typified by dolomite, calcite, quartz, illitic mica, fluorite and three types of chlorite.
B. Dubacq +3 more
doaj +3 more sources
Empirical Raman calibration of trioctahedral ferromagnesium chlorite minerals [PDF]
Journal of Raman Spectroscopy, 2023 Chlorite is a common hydrated‐aluminous phyllosilicate mineral group that forms in most geological environments (e.g., hydrothermal, igneous, sedimentary, and metamorphic).
Sarah Lamm +9 more
semanticscholar +4 more sources
Near Infrared Spectroscopic Study of Trioctahedral Chlorites and Its Remote Sensing Application
Open Geosciences, 2019 The mineral chemistry of thirteen trioctahedral chlorite samples from four regions in northwestern China, having a wide range of Fe and Mg contents and relatively constant Al and Si contents, were studied via raman spectroscopy, near infrared (NIR ...
Yang Min +7 more
doaj +3 more sources
Interpretation of the composition of trioctahedral micas [PDF]
Professional Paper, 1960 Structural formulas calculated for more than 200 published analyses of phlogopites, biotites, siderophyllites, and lepidomelanes indicate that the additional positive charges carried by trivalent cations proxying for bivalent Mg in the octahedral group of trioctahedral micas are accommodated in two different ways, (1) by a positive charge on the ...
Margaret D. Foster
semanticscholar +3 more sources
Oxidation rates and redox stabilization of ferrous iron in trioctahedral smectites
Geochimica et Cosmochimica Acta, 2023 Iron(II)-bearing trioctahedral smectites (saponites) form during anoxic alteration of basaltic rock. They are predicted to have been widespread on the early Earth and are observed in the oceanic subsurface today. Smectite structures, including the occupancy of sites in the octahedral sheet, affect iron redox behavior but the rates and products of ...
Robert Kupper +4 more
semanticscholar +4 more sources
Vanadium occupation and its leachability differences in trioctahedral and dioctahedral mica. [PDF]
RSC Adv, 2019 Vanadium in black shale is found mainly in aluminosilicate minerals such as mica. Vanadium occupation in mica directly determines the vanadium leaching rate from black shale.
Zheng Q, Zhang Y, Xue N, Liu T, Huang J.
europepmc +5 more sources
Organic Control of Dioctahedral and Trioctahedral Clay Formation in an Alkaline Soil System in the Pantanal Wetland of Nhecolândia, Brazil. [PDF]
PLoS ONE, 2016 Recent studies have focused on the formation of authigenic clays in an alkaline soil system surrounding lakes of the Nhecolândia region, Pantanal wetland.
Laurent Barbiero +5 more
doaj +2 more sources
The cluster compound In4Ti1.5Mo0.5Mo14O26 containing Mo14 clusters and the new mono- and bi-capped trioctahedral Mo15 and Mo16 clusters: Synthesis, crystal structure, and electrical and magnetic properties. [PDF]
, 2015 International audienceSingle crystals of the new quaternary compd. In4Ti1.5Mo0.5Mo14O26 were obtained by solid state reaction. The crystal structure was detd. by single-crystal X-ray diffraction.
Gall, Philippe +2 more
core +5 more sources
Timescale of a magmatic-hydrothermal system revealed by 40Ar–39Ar geochronology: the Mio-Pliocene Campiglia Marittima system (Tuscany, Italy) [PDF]
Scientific Reports, 2022 Petrology and timing of magmatic-hydrothermal systems and the linkage between plutonic and volcanic domains are central topics in geosciences, because of broad implications for natural hazards and exploitation of natural resources. We investigated by the
Gianfranco Di Vincenzo +3 more
doaj +2 more sources
The Nature of Laponite: Pure Hectorite or a Mixture of Different Trioctahedral Phases? [PDF]
Minerals, 2018 A series of laponites and synthetic OH- and fluorinated hectorites prepared from hydrothermal and melting experiments at both industrial and laboratory scale were examined with XRD and FTIR (MIR and NIR) to determine their mineralogical composition and ...
George E. Christidis +7 more
openalex +2 more sources