搜索结果: 1-15 共查到“凹凸棒石 crystal chemistry”相关记录22条 . 查询时间(0.077 秒)
Mechanisms and Crystal Chemistry of Oxidation in Annite: Resolving the Hydrogen-Loss and Vacancy Reactions
Annite Biotite Crystal Chemistry Differential Thermal Analysis Ferrioxyannite Gas Chromatography Mossbauer Spectroscopy
2011/12/5
Abstract: A synthetic octahedral-site-vacancy-free annite sample and its progressive oxidation, induced by heating in air, were studied by powder X-ray diffraction (pXRD), Mössbauer spectroscopy,...
Comparative high-pressure crystal chemistry of karrooite, MgTi2O5, with different ordering states
high-pressure different ordering states
2012/3/30
Twokarrooitecrystals,onewithadisorderparameter(X TicontentintheM1site)
of0.070(5)andtheotherwith X 0.485(5),weremountedtogetherinonediamond-anvil
cellandstudiedbysingle-crystalX-raydiffractionatseve...
Crystal chemistry of Mg-, Fe-bearing muscovites-2M1
Crystal chemistry Mg-, Fe-bearing muscovites-2M1
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
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
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
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
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
2012/4/6
Crystal-structurere?nementswereperformedonclintonite-1M crystals[idealcompo-sitionCa (Mg Al) (SiAl )O (OH) ]fromskarnsofthePredazzo-MonzoniareaandAdamelloMassif(northernItaly)withtheaimofcharacterizin...
Crystal chemistry of forsterite: A first-principles study
Crystal chemistry forsterite first-principles study
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
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
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
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
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
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...
Crystal chemistry and IR spectroscopy of Cl- and SO4-bearing cancrinite-like minerals
Crystal chemistry IR spectroscopy Cl- SO4-bearing cancrinite-like minerals
2012/4/6
CI-and S04-bearing cancrinite-like mineralsfrom Italian localities werestudied by meansofEPMA,X-raydiffraction, and IR spectroscopy to relate their chemicalcompo-sition, IR data, and structural featur...