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MINERALOGY AND ORIGIN OF CLAY MINERALS, SILICA AND AUTHIGENIC SILICATES IN LEG 14 SEDIMENTS
CLAY MINERALS AUTHIGENIC SILICATES MINERALOGY
2011/11/11
Preliminary X-ray, SEM, TEM, and optical mineralogical results are reported to discuss the paragenesis, age distribution,and origin of clay minerals, silica modifications and authigenic silicates foun...
Shock compression of liquid silicates to 125 GPa: The anorthite‐diopside join
Shock compression The anorthite‐diopside join
2014/4/8
We determined the equation of state (EOS) of three silicate liquid compositions by
shock compression of preheated samples up to 127 GPa. Diopside (Di; Ca2Mg2SiO6)
at 1773 K, anorthite (An; CaAl2Si2O...
MODIFICATION OF FIBROUS SILICATES SURFACES WITH ORGANIC DERIVATIVES – AN INFRARED SPECTROSCOPIC STUDY
FIBROUS SILICATES SURFACES ORGANIC DERIVATIVES
2011/11/7
This contribution explores the interaction of the fibrous silicates, palygorskite, sepiolite and chrysotile with a wide range of organic agents. Infrared spectroscopy (IR) methods are essential for th...
Structural Transformation of 2:1 Dioctahedral Layer Silicates during Dehydroxylation-Rehydroxylation Reactions
Cation Migration Celadonite Cis-Vacant Octahedra Dehydroxylation Glauconite Illite Rehydroxylation Smectites Structure Trans-Vacant Octahedra
2011/12/6
Abstract: The structural transformation of dioctahedral 2:1 layer silicates (illite, montmorillonite, glauconite, and celadonite) during a dehydoxylation-rehydroxylation process has been studied by X-...
Medical mineralogy as a new challenge to the geologist: Silicates in human mammary tissue?
Medical mineralogy geologist silicone mammary tissue
2012/3/31
Medical questions surrounding the toxicity of °∞silica°± and other silicon-containing materials i
troduced into the body can be answered only through use of microanalytical techniques that provide
c...
Vibrational spectra of dense, hydrous magnesium silicates at high pressure: Importance of the hydrogen bond angle
high pressure hydrogen bond angle dense hydrous magnesium silicates
2012/3/31
Changes in configuration and hydrogen bonding are inferred from the complex responses of
peak parameters (frequency, width, height, and area) to compression for various hydroxyl groups) depend not on...
Formation of Fe-silicates and Fe-oxides on bacterial surfaces in samples collected near hydrothermal vents on the Southern Explorer Ridge in the northeast Pacific Ocean
Formation Fe-silicates Fe-oxides hydrothermal vents Southern Explorer Ridge the northeast Pacific Ocean
2012/4/1
Samples collected in low-temperature (2–508 C) waters near hydrothermal vents of the Southern Explorer Ridge, in the northeast Pacific Ocean, contained fine ( ,500 nm) Fe-and Mn-oxide and Fe-silicate ...
Hydroxy-Interlayers in Expansible Layer Silicates and Their Relation to Potassium Fixation
Hydroxyaluminum Hydroxyaluminosilicate Montmorillonite Potassium Fixation Vermiculite
2011/12/8
Abstract: Hydroxyaluminosilicate (HAS) and hydroxyaluminum (HyA) ionic solutions having final Al concentrations ranging from 3.74 to 4.00 mM; NaOH/Al molar ratios of 1.0, 2.0 and 2.5; and Si/Al molar ...
Energy barriers to viscous flow and the prediction of glass transition temperatures of molten silicates
Energy barriers viscous flow glass transition temperatures molten silicates
2012/3/31
Within the framework of the Adam-Gibbs (configurational entropy) theory of viscosity,it is shown that for a given composition, the ratio of parameters Be
(a temperature inde-pendent constant) to Sc( ...
Comparison of the crystal chemistry of selected MSi6O15-based silicates
Comparison crystal chemistry MSi6O15-based silicates
2012/4/6
ThestructuresoffourA MSi O (!nH O)silicates(A NaorK,M NdorY)recently3 6 15 2determinedbytheauthorsarecomparedwithoneanotherandwiththestructuresofrelated
silicates.The2:5Si:Oratiointhesecompounds(sili...
The synthetic Cr2+ silicates BaCrSi4O10 and SrCrSi4O10: The missing links in the gillespite-type ABSi4O10 series
synthetic Cr2+ silicates BaCrSi4O10 SrCrSi4O10 missing links gillespite-type ABSi4O10 series
2012/4/5
ThenewCrcontainingsilicatecompoundsBaCrSi O andSrCrSi O weresynthe-sizedbothfromalkali-borate?uxesandbyhigh-T subsolidussolid-statereactions.Thegillespite-typecrystalstructures(spacegroup P4/ncc,Z 4)w...
Biomineralization of Layer Silicates and Hydrated Fe/Mn Oxides in Microbial Mats: An Electron Microscopical Study
Bacterial Cell Electron Microscopy Freshwater Hydrated Fe-Mn Oxides Layer Silicates Microbial Mats
2011/12/9
Abstract: The formation of layer silicates on capsuled bacterial cell walls was studied in freshwater microbial mats. The trends associated with Al, Si, Mn and Fe deposits with capsules are consistent...
Cation Exchange Capacity of Layer Silicates and Palagonitized Glass in Mafic Volcanic Rocks: A Comparative Study of Bulk Extraction and In Situ Techniques
Cation Exchange Capacity Corrensite Electron microprobe analysis Extractable cations Palagonite Smectite
2011/12/27
The cation exchange capacities (CEC) and extractable cations in smectite, corrensite and palagonitized glass from hydrothermally-altered pillow lavas and hyaloclastite breccias were measured by both b...
Rigid-unit phonon modes and structural phase transitions in framework silicates
Rigid-unit phonon modes phase transitions framework silicates
2012/4/6
Therigid-unit modemodelprovides manynewinsights into the stability and physical properties offramework silicates. In this modelthe Si04and Al04tetrahedra aretreated asverystiff,to a first approximatio...
Synthesis of high-pressure hydrous magnesium silicates: Observations and analysis
Synthesis of high-pressure hydrous magnesium silicates Observations analysis
2012/4/5
Specimens ofdense high-pressure hydrous magnesium silicates, notably phase A,phase B,and superhydrous phase B,have been synthesized for use in calorimetric and spectro-scopic experiments. X-ray diffra...