Results 21 to 30 of about 58,184 (319)

Chemical diffusion of fluorine in melts in the system Na2OAl2O3SiO2 [PDF]

open access: yes, 1985
The volatilization of fluorine from three melts in the system Na2OAl2O3SiO2 has been investigated at 1 atm pressure and 1200–1400°C. The melts chosen have base compositions corresponding to albite, jadeite and a peraluminous melt with 75 mole % SiO2 ...
Scarfe, Christopher M.   +1 more
core   +1 more source

The effect of oxidation state on the viscosity of melts in the system Na2O-FeO-Fe2O3-SiO2 [PDF]

open access: yes, 1987
The viscosities of two melts in the system Na2O-FeO-Fe2O3-SiO2 have been measured as a function of oxidation state. The experiments were conducted by concentric-cylinder viscometry, on melts equilibrated with gas mixtures in a vertical tube, gas-mixing ...
Virgo, David, Dingwell, Donald B.
core   +1 more source

Chemical diffusivity of boron in melts of haplogranitic composition [PDF]

open access: yes, 1993
Chemical diffusivities of B in synthetic melts of haplogranitic composition have been measured by the diffusion couple technique at 1 atm between 1200–1600°C.
Chaussidon, Marc   +2 more
core   +1 more source

Configurons: Thermodynamic Parameters and Symmetry Changes at Glass Transition

open access: yesEntropy, 2008
Thermodynamic parameters of configurons – elementary excitations resulting from broken bonds in amorphous materials – are found from viscosity-temperature relationships.
Michael I. Ojovan
doaj   +1 more source

Non-Newtonian Rheology of Igneous Melts at High Stresses and Strain Rates: Experimental Results for Rhyolite, Andesite, Basalt, and Nephelinite [PDF]

open access: yes, 1990
The stress-strain rate relationships of four silicate melt compositions (high-silica rhyolite, andesite, tholeiitic basalt, and nephelinite) have been studied using the fiber elongation method.
Dingwell, Donald B., Webb, Sharon L.
core   +1 more source

Electrochemistry of silicon in chloro-fluoride and carbonate melts [PDF]

open access: yesJournal of Mining and Metallurgy. Section B: Metallurgy, 2003
The electrochemical behavior of K2SiF6 in chloro-fluoride melts and that of SiO2 in carbonate melts has been studied. Silicon, titanium silicides, boron silicide and ternary compounds Ti-Si-B have been deposited from chloro-fluoride melts.
Devyatkin S.V.
doaj   +1 more source

Non-Arrhenian Temperature-Dependent Viscosity of Alkali(ne) Carbonate Melts at Mantle Pressures

open access: yesFrontiers in Earth Science, 2021
The viscosity of carbonate melts is a fundamental parameter to constrain their migration and ascent rates through the mantle and ultimately, their role as carbon conveyors within the deep carbon cycle.
Xenia Ritter   +5 more
doaj   +1 more source

Melt densities in the Na2O-FeO-Fe2O3-SiO2 system and the partial molar volume of tetrahedrally-coordinated ferric iron in silicate melts [PDF]

open access: yes, 1988
The densities of 12 melts in the Na2O-FeO-Fe2O3-SiO2 system have been determined in equilibrium with air, in the temperature range of 1000–1500°C, using the double bob, Archimedean technique.
Dickinson Jr., James E.   +2 more
core   +1 more source

Experimental strategies for the investigation of low temperature properties in granitic and pegmatitic melts [PDF]

open access: yes, 1993
The physical behavior of silicate melts during the final stages of intrusion in the earth's crust are poorly understood. In particular, the low temperature limit of igneous petrogenesis is poorly constrained.
Dingwell, Donald B.
core   +1 more source

Effects of structural relaxation on cationic tracer diffusion in silicate melts [PDF]

open access: yes, 1989
The glass transition in silicate melts is a curve in time-temperature space marking the transition of the melt structure from an unrelaxed, disequilibrium glass to a relaxed, equilibrium liquid. Tracer diffusivity data obtained in glasses vs.
Dingwell, Donald B., Donald B. Dingwell
core   +1 more source

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