搜索结果: 31-45 共查到“地质学 Chemistry”相关记录65条 . 查询时间(0.318 秒)
Chemistry and genetic implications of tourmaline and Li-F-Cs micas from the Valdeflores area (Cáceres, Spain)
Valdeflores area tourmaline-rich rocks Li-F-Cs
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2012/3/30
Pervasivemetasomatismthatinvolvedtheformationoftourmaline-richrocksandin?ux
ofLi,F,andCsintoOrdovicianpsammo-peliticmetasedimentsoccurredintheValde?ores
area(Ca!ceres,Spain).NumerousLi-andSn-bearing...
Crystal chemistry of Mg-, Fe-bearing muscovites-2M1
Crystal chemistry Mg-, Fe-bearing muscovites-2M1
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2012/3/31
Phengitic muscovite-2 M1crystals [[12](K0.88 20.99Na0.01 20.09Ca0.00 20.06Ba0.00 20.01)[6](Al1.64 21.88Fe210.06 20.29Fe Mg0.00 20.16Mn0.00 20.07Ti0.00 20.06)[4](Si2.87 23.30Al0.70 21.13)(OH)1.56 22.07...
Crystal structure-crystal chemistry relationships in the zeolites erionite and offretite
Crystal structure-crystal chemistry relationships zeolites erionite offretite
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2012/3/31
This study clarifies the crystal structure variations and relationships in the zeolites eri-onite and offretite. The crystal structure analyses used Rietveld analysis of X-ray powder diffraction data,...
Crystal chemistry of the zeolites erionite and offretite
Crystal chemistry zeolites erionite offretite
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2012/3/31
Many known occurrences of the zeolites erionite and offretite have been characterized by electron probe microanalysis, X-ray powder diffraction, and optical microscopy. For the first time, a substanti...
Bamfordite, Fe3+ Mo2O6(OH)3·H2O, a new hydrated iron molybdenum oxyhydroxide from Queensland, Australia: Description and crystal chemistry
Fe3+ Mo2O6(OH)3·H2O hydrated iron molybdenum oxyhydroxide Description crystal chemistry
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2012/3/31
Bamfordite from the abandoned W-Mo-Bi mines at Bamford, Queensland, Australia, is a new hydrated iron molybdate with a unique structure. This mineral formed by oxidation of molybdenite, MoS2, in the p...
Comparison of the crystal chemistry of selected MSi6O15-based silicates
Comparison crystal chemistry MSi6O15-based silicates
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2012/4/6
ThestructuresoffourA MSi O (!nH O)silicates(A NaorK,M NdorY)recently3 6 15 2determinedbytheauthorsarecomparedwithoneanotherandwiththestructuresofrelated
silicates.The2:5Si:Oratiointhesecompounds(sili...
Clintonite-1M: Crystal chemistry and its relationships to closely associated Al-rich phlogopites
Clintonite-1M:Crystal chemistry relationships associated Al-rich phlogopites
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2012/4/6
Crystal-structurere?nementswereperformedonclintonite-1M crystals[idealcompo-sitionCa (Mg Al) (SiAl )O (OH) ]fromskarnsofthePredazzo-MonzoniareaandAdamelloMassif(northernItaly)withtheaimofcharacterizin...
Third-generation synchrotron x-ray diffraction of 6-mm crystal of raite, 'Na3Mn3Ti0.25Si8O20(OH)2z10H2O, opens up new chemistry and physics of low-temperature minerals
Third-generation synchrotron x-ray diffraction low-temperature minerals chemistry and physics
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2011/11/11
The crystal structure of raite was solved and refined from data collected at Beamline Insertion Device 13 at the European Synchrotron Radiation Facility, using a 3 3 3 3 65 mm single crystal. The refi...
A Critique of Diffuse Double Layer Models Applied to Colloid and Surface Chemistry
Clay Dispersion Clay Swelling Diffuse Double Layer DLVO Electrostatic Attraction Theory Interparticle Forces Ockham's Razor Schiller Layers Smectites
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2011/12/22
Abstract: The use of Derjaguin-Landau-Verwey-Overbeek (DLVO) theory in colloid science has continued to the present day in spite of the inability of this theory to explain, even qualitatively, numerou...
Crystal chemistry of forsterite: A first-principles study
Crystal chemistry forsterite first-principles study
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2012/4/5
Wepresenta?rst-principlesstudy(localdensityapproximation)ofthestructuralprop-
ertiesofforsteriteunderpressure.Thishighlyanisotropicmagnesiumorthosilicateisthe
mostabundantphaseoftheEarth!flsupperman...
Molar volumes of mixing of almandine-pyrope and almandine-spessartine garnets and the crystal chemistry and thermodynamic-mixing properties of the aluminosilicate garnets
Molar volumes almandine-pyrope almandine-spessartine garnets crystal chemistry thermodynamic-mixing properties aluminosilicate garnets
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2012/4/5
Thealuminosilicategarnetbinariesalmandine-pyropeandalmandine-spessartinewerestudiedbypowderX-rayandFeMo!§ssbauermethods.Re?nementsoftheunit-cellcon
stantsalongthealmandine-pyropejoinshowthatthevolume...
Crystal chemistry of superfluorous phase B (Mg10Si3O14F4): Implications for the role of fluorine in the mantle
Crystal chemistry superfluorous phase B(Mg10Si3O14F4) Implications role mantle
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2012/4/5
Single-crystalX-raydiffractiondatahavebeenobtainedforcrystalsoftheFanalogof
superhydrousphaseB,MgSi O F .Twinnedcrystalsweresynthesizedusingasplit-
sphereanvilapparatus(USSA-2000)atpressuresbetween1...
Structural behavior, crystal chemistry, and phase transitions in substituted leucite: High-resolution neutron powder diffraction studies
Structural behavior crystal chemistry phase transitions substituted leucite High-resolution neutron powder diffraction studies
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2012/4/1
High-resolution neutron powder diffraction was used to study phase transitions in theleucite phases of KAlSi206, RbAlSi20", CsAlSi206, and KFeSi206. Thetemperature-depen-dent structural behavior invol...
An XAFS study of the crystal chemistry of Fe in orthopyroxene
XAFS crystal chemistry Fe orthopyroxene
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2012/4/9
X-ray absorption fine-structure (XAFS) spectra at the Fe Kedge in Bamble enstatite (Mgo88Feo,,)Si03 wereanalyzed in conjunction withtheoretical XAFSspectra to determine the bonding configuration of Fe...
X-ray structure refinements of tremolite at 140 and 295 K: Crystal chemistry and petrologic implications
X-ray structure refinements tremolite chemistry petrologic implications
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2012/4/6
Anear-end-member natural tremolite, N!lo.o,Ca1.97M~.9sFeo.Q3Alo.oISis.oo022(OH)2' was studied bysingle-crystal X-raydiffraction at 140and 295Kto seek a possible crystal-chemicalexplanation for the typ...