Raman spectroscopy and scanning electron microscopy methods were used to study the fragment of Markovka (H4 chondrite) meteorite. A characteristic set silicate minerals (olivine pyroxene), oxides hydroxides (maghemite goethite), troilite, carbonates (aragonite) was determined. The structural features revealed by allow us draw important conclusions on thermal history parent body including both t...

partial least squares modeling as a powerful multivariate statistical tool was applied tothe simultaneous spectrophotometric determination of silicate and phosphate in aqueoussolutions. the concentration range for silicate and phosphate were 0.02-0.6 and 0.4-3 μg ml-1,respectively. the experimental calibration set was composed with 30 sample solutions using amixture design for two component mix...

[1] The basic features of the geomagnetic reversal chronology of the last 160 million years are well established. The relationship between this history and other features of the field, however, has been elusive. The determination of past field strength (paleointensity) is especially challenging. Commonly accepted results have come from analyses of bulk samples of lava. Historic lavas have been ...

in this study, rice husk and sodium silicate solution were used to produce particleboards. sodium silicate was used as bonding aid by 25, 20, 15, 10, 5 and zero percent (based on rice husk dry weight). to modify the mechanism of bondability, one percent of 4,4’-diphenylmethane diisocyanate (mdi) was added for every five percent less sodium silicate solution. the effect of diisocyanate on bondab...

Reactive iron (Fe) oxides and sheet silicatebound Fe in reservoir rocks may affect the subsurface storage of CO2 through several processes by changing the capacity to buffer the acidification by CO2 and the permeability of the reservoir rock: (1) the reduction of threevalent Fe in anoxic environments can lead to an increase in pH, (2) under sulphidic conditions, Fe may drive sulphur cycling and...

We focus on the development of new silicate phosphors for a white LED. In the europium doped silicate system, four LED phosphor candidates—Li2SrSiO4:Eu, Ba9Sc2Si6O24:Eu, Ca3Si2O7:Eu and Ba2MgSi2O7:Eu were found. Luminescent properties under near UV and visible excitation were investigated for the new Eu2+ doped LED silicate phosphors. These new phosphors have a relatively strong absorption band...

Abstract Enhanced Rock Weathering is a proposed Carbon Dioxide Removal technology involving the application of crushed silicate rocks, such as basalt, to agricultural soils with potential co-benefits for crops and soils, mitigation ocean acidification. Here we address requirement diverse stakeholders informative studies quantifying possible environmental health risks Weathering. Using life-cycl...

The meteorite Erg Chech (EC) 002 is the oldest felsic igneous rock from solar system analyzed to date and provides a unique opportunity study formation of crusts on differentiated protoplanets immediately after metal–silicate equilibration or core formation. extinct 53Mn-53Cr chronometer chronological constraints EC by applying isochron approach using chromite, metal–silicate–sulfide, whole-roc...