Results 21 to 30 of about 127 (124)
Relationship between mineralogy and the physico-chemical properties of till in central Finland [PDF]
Bulletin of the Geological Society of Finland, 1992 The chemical and physical characteristics of the fine fraction of till were examined in the area of the Raahe-Ladoga metallogenic belt in central Finland. Till, weathered bedrock and rock samples were collected from the area, where element concentrations
M.L. Räisänen, M. Tenhola, J. Mäkinen
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Colloids and Interfaces, 2019 Low-temperature nitrogen adsorption–desorption isotherms, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, as well as infrared spectroscopy were used to characterize structural features of raw and acid-treated ...
Halyna Sokol +4 more
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Bityite 2M1 from Eräjärvi compared with related Li-Be brittle micas [PDF]
Bulletin of the Geological Society of Finland, 1985 Bityite was encountered in thee lithium pegmatite dykes in the Eräjärvi area in Orivesi, southern Finland. The mineral is closely associated with beryl occurring in pseudomorphs after it or in cavities with bertrandite, fluorite and fluorapatite as a ...
S.I. Lahti, R. Saikkonen
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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 possible compositional heterogeneity. The end materials contained both Li- and Na-bearing phases. The
Christidis, George +7 more
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Journal of Economic Geology, 2021 Introduction The chemical composition of biotite in mineralization associated with granitoids and copper porphyry deposits is sensitive to several chemical and physical factors.
Ahmad Ahmadi Khalaji +4 more
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Scientific Reports, 2017 The paleoclimate during the Early Eocene in Maritime Antarctica is characterized by cool conditions without a pronounced dry season. Soils formed on volcanic material under such climate conditions in modern analogue environments are usually Andosols rich
Diogo Noses Spinola +6 more
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Revista Brasileira de Ciência do Solo, 2018 Studies of heavy metals are concentrate on clay fractions, but coarser fractions of the soil can constitute significant sources of structural forms of heavy metals.
Araína Hulmnn Batista +3 more
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Small Methods, EarlyView.We developed a 3D‐printed nerve interface integrating a biomimetic nanocomposite hydrogel with sustained delivery of thermostable FGF‐2. The bioactive interface supports Schwann cell activity and myelination while providing a regenerative microenvironment.
Diego N. Rodriguez‐Sanchez +10 more
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Structural iron in dioctahedral and trioctahedral smectites: a polarized XAS study [PDF]
Physics and Chemistry of Minerals, 2015 The chemical form of structural Fe in smectites influences many physicochemical properties of these clay minerals. Powder EXAFS data for structural Fe in smectites have been reported; however, the preferred orientation of clay platelets with respect to the X-ray beam may lead to erroneous conclusions on the local chemical environment.
Finck, N., Schlegel, M. L., Bauer, A.
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Appraisal of Six Natural Mica Reference Materials for In Situ Rb‐Sr Geochronology
Geostandards and Geoanalytical Research, EarlyView.Key Points Evaluated six natural mica reference materials for in situ LA‐ICP‐MS/MS Rb‐Sr geochronology using geochemical, microstructural and isotopic characterisation. Identified robust primary reference materials: Mount Dromedary biotite (99.37 Ma) and Mica‐Fe biotite (307.75 Ma). La Posta biotite and Högsbo muscovite are suitable secondary reference
Hugo K.H. Olierook +38 more
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