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Devitrification of Volcanic Glasses in Konya Volcanic Units, Turkey
Clay Minerals Feldspar Devitrification Volcanic Glass Konya Turkey
2009/7/8
The study area is composed of volcanic, sedimentary and volcano-sedimentary units, which are exposed south and southwest of the city of Konya. XRD analysis indicates that the volcanic units contain ha...
Structural investigation of platinum solubility in silicate glasses
Structural investigation platinum solubility silicate glasses
2012/4/1
The coordination environment of 20-200 ppm Pt in yellowish glasses from the CaO-Al O -SiO
2 3 2(CAS) ternary was studied using X-ray absorption fine structure spectroscopy at the Pt-L edge.
IIIedge...
Hydrothermal Conversion of Trachytic Glass to Zeolite. 3. Monocationic Model Glasses
Analcime Chabazite Glass-to-Zeolite Conversion Phillipsite Synthesis Trachytic Glasses Zeolite Synthesis
2011/12/7
Abstract: Experiments on zeolitization were conducted on four synthetic monocationic glasses (Na, K, Ca, or Mg-rich glass) with Si/Al molar ratios of 2.67, similar in acidity to many volcanic glasses ...
The influence of water on the structure of hydrous sodium tetrasilicate glasses
water structure hydrous sodium tetrasilicate glasses
2012/4/1
The structure of sodium tetrasilicate (Na2Si4O9) glasses containing 0 to 10 wt% water was investigated by a combination of Raman, IR, and NMR methods. Both the
29 Si magic angle spinning NMR data and...
The influence of water on the environment of transition metals in silicate glasses
The influence water environment transition metals silicate glasses
2012/3/30
The effect of water (5 H2O 1 OH) on the environment of Co21and Ni21 in albite glass was investigated by electronic absorption spectroscopy. The visible spectra of Co21-doped glasses change only slight...
Disorder among network-modifier cations in silicate glasses: New constraints from triple-quantum 17O NMR
Disorder network-modifier cations silicate glasses New constraints triple-quantum 17O NMR
2012/4/6
Thestateoforderingamongnetwork-modi?ercationsinmoltensilicateshasapoten-tiallylargeeffectontheiroverallcon?gurationalentropy,onfreeenergiesofmixing,and
onviscosityanddiffusivity.Mostmodelsofthermodyn...
Coordination of Ti4+ in silicate glasses: A high-resolution XANES spectroscopy study at the Ti K edge
Coordination of Ti4+ silicate glasses high-resolution XANES spectroscopy study Ti K edge
2012/4/1
The coordination environment of Ti in eight Ti-bearing glasses of the Na Si-Na,Ti
y4 ;:join (NTS) and in six ATY2 glasses (A20Ti02.2Y02, with A =Na, K, ~r Rb andSi or Ge) was determined using high-re...
Phosphorus speciation changes across the glass transition in polymerized alkali silicate glasses and melts
Phosphorus speciation glass transition alkali silicate glasses melts
2012/4/9
In situ, high-temperature Raman spectroscopy of Na,O.9SiO, glasses and melts with and without 2 mol% P,05 has been conducted to 1491 K (near the liquidus temperature). In the temperature range from 29...
Optimizing the electron microprobe analysis of hydrous alkali aluminosilicate glasses
Optimizing electron microprobe analysis hydrous alkali aluminosilicate glasses
2012/4/6
The time-dependent loss of NaKa X-ray intensity during electron-beam irradiation of hydrous alkali alumino silicate glasses is apparently moresignificant during the initial few seconds ofbeam exposure...
Tensile strengths of hydrous vesicular glasses: An experimental study
Tensile strengths hydrous vesicular glasses experimental study
2012/4/6
Wehave measured the pressures of decrepitation of vesicles in synthetic glasses of feldspar compositions (NaAlSi30g-KAlSi30g). Vesicles filled withXedo not decrepitate at internal pressures of 160 MPa...
Molecular dynamics simulations of liquids and glasses in the system NaAlSiO4-SiO2: Physical properties and transport mechanisms
Molecular dynamics simulations liquids glasses NaAlSiO4-SiO2 Physical properties transport mechanisms
2012/4/5
Thermodynamic and transport properties often compositions in the binary system NaAISi04-Si02have beendetermined bythe methodofmoleculardynamics simulation.
Thecomputations wereperformed oncollections...
An in situ Raman spectroscopic study of Na2Si2O5 at high pressures and temperatures: Structures of compressed liquids and glasses
situ Raman spectroscopic study Na2Si2O5 high pressures temperatures Structures glasses
2012/4/5
Raman spectra ofNa2Si20sglassand Na2Si20sliquid have been collected in situ to pressuresof16GPaat300Kand 10GPaat885K.Inglasscompressed at300K,bands
associated withintertetrahedral bridging 0 atoms de...
Four-membered rings in silica and aluminosilicate glasses
Four-membered rings silica aluminosilicate glasses
2012/4/5
Assignmentofthe peaksnear485em-I in vibrational spectra ofSi02-M7;:;Al02(where M=an alkali oralkaline earth element) glassesto v,(T-O-T) modesin four-membered
rings wastested withmolecularorbital cal...
Coordination of Si in Na2O-SiO2-P2O5 glasses using Si K- and L-edge XANES
Coordination of Si Na2O-SiO2-P2O5 glasses Si K- and L-edge XANES
2012/4/5
Si K- and L-edge X-ray absorption near-edge structure (XANES) of SiOz-PzOs and NazO-SiOz-PzOs glasses containing PzOsabove 30mol%wereinvestigated using synchro-tron radiation. BothSiK-and L-edge spect...
Growth of Clay Minerals in Natural and Synthetic Glasses
Crystallization Domain structure Glass High-resolution transmission electron microscopy Noncrystalline Primitive clay
2012/1/5
High-resolution transmission electron microscopy (HRTEM) has shown regions of crystallites within noncrystalline matrices of three types of glass (volcanic glass, alkalic igneous glass, and synthetic,...