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搜索结果: 1-12 共查到地质学 Aluminosilicate相关记录12条 . 查询时间(0.062 秒)
Oxygen isotope thermometry based on fractionations among quartz, garnet, kyanite, silliman- ite, and potassium feldspar in amphibolite to granulite facies schists and gneisses was compared to thermo...
Mineral dissolution experiments using batch cultures of soil and groundwater bacteria were monitored with solution chemistry and various microscopic techniques to determine the effects of these organi...
Abstract: The level of Fe impurities in 2 well-crystallized kaolinites was modified (by addition or chemical removal treatment) to analyze the Fe influence in the aluminosilicate zeolite synthesis.The...
Thealuminosilicategarnetbinariesalmandine-pyropeandalmandine-spessartinewerestudiedbypowderX-rayandFeMossbauermethods.Re?nementsoftheunit-cellcon stantsalongthealmandine-pyropejoinshowthatthevolume...
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...
Molecularorbitalcalculations onvariousaluminosilicate Q3T-OHandbridging0spe-cieswereperformed to modelatomic structural changesonmineralsurfacesthat occuras a function ofpH. Calculatedvibrational fre...
The enthalpy ofordering ofAland Sibetween tetrahedral sites in framework structures is now known from several studies to bein the range 0.3-1.4 eVper two Al-O-Si linkages, depending on the structure a...
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...
Abstract: Hollow spherical particles of aluminosilicate having diameters of 80 to 100 Å and high electric charge were synthesized by heating solutions containing Si and Al concentrations of abou...
Noncrystalline aluminosilicate gels with Al2O3/(Al2O3 + SiO2) weight ratios from 0.3 to 0.5 were reacted in 0.1 N KOH at temperatures varying from 125° to 175°C. The pH of the solutions dropped sharpl...
Acidified suspensions of Al-saturated kaolinite, montmorillonite, mica, illite, and biotite in 10−3 M NaNO3 were potentiometrically titrated with 0.1 N NaOH and 0.1 N HNO3 in succession in a CO2...
The rates of release of Al by M NH4NO3 (pH 3) from minerals saturated with Al ions at pH 3 suggest that Al ions migrated from the surface layers and the matrix cores of kaolinite, montmorillonite, ill...

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