Results 21 to 30 of about 39,957 (227)

Si-P impure Al-Goethite Mineralization on the island of Dugi Otok (Central Adriatic, Croatia)

open access: yesGeologia Croatica, 2008
At the western seaward coast of the island of Dugi Otok, unusual goethite mineralization occurs as the infilling of a system of thin crevices in the Upper Cretaceous limestones of the Adriatic carbonate platform.
Branimir Šegvić   +4 more
doaj   +1 more source

CHEMICAL COMPOSITION AND STRUCTURE OF THE WEATHERING PRODUCTS OF IRON-NICKEL OF THE GRUZ’KE CHONDRITE (H4)

open access: yesГеохімія техногенезу, 2022
Secondary weathering microstructures such as oxide rims, oxide veins and pseudomorphs of the weathering products are genetically related to altered (weathered) iron-nickel grains (kamacite α-(Fe,Ni), taenite γ-(Fe,Ni), plessite α+γ-(Fe,Ni)) of the Gruz ...
S.N. Shyrinbekova
doaj   +1 more source

Insights into secondary reactions occurring during atmospheric ablation of micrometeoroids [PDF]

open access: yes, 2016
Ablation of micrometeoroids during atmospheric entry yields volatile gases such as water, carbon dioxide, and sulfur dioxide, capable of altering atmospheric chemistry and hence the climate and habitability of the planetary surface.
Court, RW, Tan, J
core   +1 more source

Atomic scale study of thermal reduction of nano goethite coexisting with magnetite

open access: yesAIP Advances, 2013
Evolution of the local structure and magnetic properties of nano particles of goethite having magnetite as a composite due to controlled annealing treatments in vacuum has been studied using Mossbauer spectroscopy.
L. Herojit singh   +4 more
doaj   +1 more source

Quantifying Iron Oxide Mineral Contents in Miocene Oceanic Red Beds for the Deep-Sea Oxidation Evolution in the South China Sea

open access: yesFrontiers in Earth Science, 2022
The International Ocean Discovery Program (IODP) Expedition 349 recovered Miocene oceanic red beds overlying the basaltic basement in the South China Sea.
Xuan Lyu   +6 more
doaj   +1 more source

Fine-scale analysis of biomineralized mollusc teeth using FIB and TEM [PDF]

open access: yes, 2010
When it comes to mineral synthesis, there is a lot we can learn from nature. Although we can synthesize a range of materials in the laboratory, the experimental conditions are often constrained to particular ranges of temperature, pH, etc.
Clode, P.L.   +4 more
core   +2 more sources

Integrating Density Functional Theory Modeling with Experimental Data to Understand and Predict Sorption Reactions: Exchange of Salicylate for Phosphate on Goethite

open access: yesSoil Systems, 2020
Density functional theory (DFT) calculations are a quantum mechanical approach that can be used to model chemical reactions on an atomistic scale. DFT provides predictions on structures, thermodynamics, spectroscopic parameters and kinetics that can be ...
James D. Kubicki, Tsutomu Ohno
doaj   +1 more source

Influencing factors and environmental effects of interactions between goethite and organic matter: A critical review

open access: yesFrontiers in Environmental Science, 2022
This paper reviews progresses in the interactions between goethite and organic matter (OM) and their environmental effects in recent decades. The interactions mainly include the effect of organic matter on the surface properties and the crystallization ...
Shuqi Yi   +4 more
doaj   +1 more source

Changes in dissolved iron deposition to the oceans driven by human activity: a 3-D global modelling study [PDF]

open access: yes, 2015
The global atmospheric iron (Fe) cycle is parameterized in the global 3-D chemical transport model TM4-ECPL to simulate the proton- and the organic ligand-promoted mineral-Fe dissolution as well as the aqueous-phase photochemical reactions between the ...
Baker, Alex   +5 more
core   +2 more sources

Mineralogy of the clay fraction of alfisols in two slope curvatures: IV - spatial correlation with physical properties

open access: yesRevista Brasileira de Ciência do Solo, 2013
Although the influence of clay mineralogy on soil physical properties has been widely studied, spatial relationships between these features in Alfisols have rarely been examined.
Livia Arantes Camargo   +2 more
doaj   +1 more source

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