The Silica Minerals
نویسندگان
چکیده
منابع مشابه
Ionic mobility in stuffed-silica minerals
Using a combination of dielectric spectroscopy and atomistic computer simulation techniques, the dynamical behaviour of loosely bound cations in the stuffed-silica minerals nepheline, yoshiokaite and ß-eucryptite has been investigated. The investigation has been extended to include the feldspar minerals albite, K-feldspar and anorthite. The low-frequency dielectric properties of all of the mine...
متن کاملThe Silica Tetrahedron and the Architecture of Silicate Minerals
With oxygen and silicon comprising approximately 85% of the atoms in Earth’s crust, most minerals in the crust include these two elements, and form the class of minerals called silicates. The basic building block of all silicate minerals is the silica tetrahedron, in which one silicon ion bonds with four oxygen ions. This arrangement of ions (coordination number of 4) is dictated by the ratio o...
متن کاملEffects of Aluminum on the Precipitation Rate of Silica Minerals
The occurrences of silica deposits (quartz veins, silica sinters, silica scales) suggest that precipitation via nucleation and overgrowth on pre-existing mineral surfaces occurs under crustal conditions. We conducted hydrothermal flow-through experiments on silica precipitation using no mineral substrate at 120–430 °C and 31 MPa for understanding the effects of the aluminum on the mineralogy an...
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Bell III, E. A. Cloutis, A. Wang, S. W. Ruff, M. A. Craig, D. T. Bailey, J. R. Johnson, P. A. de Souza, Jr., W. H. Farrand, Dept. of Astronomy, Cornell Univ., Ithaca, NY ([email protected]), Dept. of Geography, Univ. of Winnipeg, Winnipeg, MB, Canada, Dept. of Earth & Planetary Sciences, Washington Univ., St. Louis, MO, 4 School of Earth and Space Exploration, Arizona State Univ., Tempe, ...
متن کاملWater stress, nano silica, and digoxin effects on minerals, chlorophyll index, and growth in ryegrass
Water shortage worldwide mandates minimum use of irrigation water with maximumefficiency and productivity in all agricultural crops, landscape plants and turf. The objective inthis experiment was to study the effect of two levels of evapotranspiration-based (ETc) droughtin combination with two levels of nanosilicon dioxide (SiO2; NanSi1=1 mM and NanSi=2 mM),two levels of digoxin (Dig1=0.25 mg.l...
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ژورنال
عنوان ژورنال: Nature
سال: 1939
ISSN: 0028-0836,1476-4687
DOI: 10.1038/143415a0