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Mg-Rich Smectite “Precursor” Phase in the Tagus Basin, Spain
Precursor Clay Smectite Stevensite Tagus Basin (Spain) Incipient Crystallization
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2011/12/6
Abstract: The pink clays from the Tagus basin, Spain, were characterized by X-ray difraction (XRD), infrared spectroscopy (IR), scanning electron microscopy (SEM), and transmission electron microscopy...
Authigenesis of Trioctahedral Smectite in Magnesium-Rich Carbonate Speleothems in Carlsbad Cavern and Other Caves of the Guadalupe Mountains, New Mexico
Authigenesis Carlsbad Cavern Caves Dolomite Huntite Moonmilk Stevensite Trioctahedral Smectite
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2011/12/6
Abstract: Trioctahedral smectite is a constituent of Mg-rich carbonate crusts and moonmilks (pasty deposits) in caves of the Guadalupe Mountains of southeastern New Mexico. Energy dispersive X-ray mic...
First Occurrence of a Stacking Sequence including (?0? 180? Rotations in Mg-Rich Annite
Annite Biotite HRTEM Mica Polytype-2O Polytypism Stacking Disorder
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2011/12/8
Abstract: Transmission electron microscopy (TEM) observation shows narrow regions in a Ti-containing Mg-rich annite of composition (K0.90Na0.02)(Mg0.72Fe2+1.78Mn0.03Ti0.27Al0.05)(Si2.77Al1.23)O10(OH,F...
Local Ca-Mg distribution of Mg-rich pyrope-grossular garnets synthesized at different temperatures revealed by 29Si MAS NMR spectroscopy
Local Ca-Mg distribution Mg-rich pyrope-grossular garnets synthesized different temperatures revealed 29Si MAS NMR spectroscopy
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2012/4/1
Pyrope-grossular solid solutions, (Mg,Ca) Al Si O , of composition Py Gr and Py Gr were3 2 3 12 85 15 75 25
synthesized at 1000, 1200, and 1400 ?C and 30 kbars in a piston-cylinder device. The synt...
A Synthetic Na-Rich Mica: Synthesis and Characterization by 27Al and 29Si Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy
KGa-1 MAS NMR Spectroscopy Metakaolinite Mica Na Mica Synthetic Clay Mineral
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2011/12/7
Abstract: A swelling mica, Na2Mg3(Al2Si2)O10F2·xH2O, (hereafter “Na-4 mica”) was synthesized from metakaolinite + MgO and Mg aluminosilicate gels at different temperatures and durations using NaF flux...
Smectites in Iron-Rich Calcareous Soil and Black Soils of Taiwan
Black Soils Iron-Rich Calcareous Soil Mollisols Smectite Vermiculite Vertisols
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2011/12/7
Abstract: The iron-rich calcareous soil (Typic Rhodustalf) from the Penghu island group represents a volcanic area. The black soils (Typic Haplustert, Vertic Endoaquoll, Typic Hapludolls) are typical ...
Relationships between respiratory diseases and quartz-rich dust in Idaho, U.S.A.
respiratory diseases quartz-rich dust Idaho PM10
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2012/3/31
Quartz°(TM)one of the most abundant minerals in the Earth°Os crust°(TM)has been deemed a human c
cinogen by the International Agency for Research on Cancer (IARC), with the main threat to humans
bei...
Raman spectroscopic identification of B-free and B-rich kornerupine (prismatine)
Raman spectroscopy kornerupine X-ray diffraction B-free B-rich
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2012/3/31
This is the first application of Raman spectroscopy to the characterization of the kornerupine
group of borosilicate minerals. Raman microprobe spectra were collected from ~100 to ~4000 cm
from 13 s...
Fe3+-Rich Montmorillonite-Beidellite Series in Ayvacik Bentonite Deposit, Biga Peninsula, Northwest Turkey
Biga Peninsula Fe-rich Beidellite Montmorillonite Turkey
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2011/12/6
Abstract: The Ayvac齥 bentonites, products of Miocene calc-alkaline volcanic rocks, are composed of smectite of the montmorillonite-beidellite series. Fault-related hydrothermal solutions have altered ...
Subsolidus and melting experiments of a K-rich basaltic composition to 27 GPa: Implication for the behavior of potassium in the mantle
K-rich basaltic composition 27GPa Subsolidus and melting experiments
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2012/3/30
SubsolidusandmeltingexperimentsofaK-richbasalticcompositionhavebeenper-
2wt%)at6¤C12.5GPaandabove22.5GPa,respectively.Bothpyroxeneandgarnetma
actasmainreservoirsforKinthemantle.Sanidine(KAlSi
O )or...
Solid State NMR Characterization of the Thermal Transformation of an Illite-Rich Clay
Illite Iron Paramagnetic Center Solid-State NMR Thermal Transformation
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2011/12/9
Abstract: Lode, a dioctahedral illite-rich clay from Latvia belonging to the mica group of clay minerals, undergoes thermal transformation via a series of structurally disordered intermediate phases. ...
Cation sites in Al-rich MgSiO3 perovskites
Cation sites Al-rich MgSiO3 perovskites
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2012/4/1
Local structure analysis of Al-containing magnesium silicate perovskite has been carried out with X-ray absorption spectra recorded at the Mg, Al, and Si K -edges using the SA32 beam-line of SuperAco ...
The chemical composition of REE-Y-Th-U-rich accessory minerals in peraluminous granites of the Erzgebirge-Fichtelgebirge region, Germany, Part I: The monazite-(Ce)-brabantite solid solution series
chemical composition REE-Y-Th-U-rich accessory minerals peraluminous granites Erzgebirge-Fichtelgebirge region monazite-(Ce)-brabantite solid solution series
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2012/3/31
eraluminous granites of the Erzgebirge-Fichtelgebirge, Germany, are hosts of various members of the monazite group of minerals that display an unprecedented compositional diversity. The Eibenstock S-t...
Structure of monoclinic Na-rich birnessite and hexagonal birnessite: I. Results from X-ray diffraction and selected-area electron diffraction
Structure monoclinic Na-rich birnessite hexagonal birnessite X-ray diffraction selected-area electron diffraction
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2012/4/6
Onthebasisoftheseexperimentalobervations,structuralmodelsforNaBiandHBiareproposed.NaBiconsistsofalmostvacancy-freeMnoctahedrallayers.Thedeparturefrom
thehexagonalsymmetryoflayersiscausedbytheJahn-Tel...
Structure of synthetic monoclinic Na-rich birnessite and hexagonal birnessite: II. Results from chemical studies and EXAFS spectroscopy
synthetic monoclinic Na-rich birnessite hexagonal birnessite II. Results chemical studies EXAFS spectroscopy
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2012/4/6
SolutionchemicaltechniqueswereusedtostudytheconversionofsyntheticNa-richbuserite(NaBu)tohexagonal(H-exchanged)birnessite(HBi)atlowpH.Thelow-pH
reactionisbroadlycharacterizedbytheexchangeofstructuralN...