搜索结果: 1-15 共查到“地质学 Micas”相关记录25条 . 查询时间(0.045 秒)
Dynamic electrochemical assessment of redox reactions in natural micas between 613 and 1373 K at 105 Pa
natural micas 613 and1 373K 105 Pa ZrO2-EMF
2012/3/31
ZrO -EMFmeasurementswerecarriedoutonnaturalbiotitesamplesbetweenabout400
and1100Cinaclosedsysteminapureargonatmosphere(99.9999%).TheEMFpatterns
arecomplexandcannotbecomparedtoclassicalequilibrium1/T...
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
2012/3/30
Pervasivemetasomatismthatinvolvedtheformationoftourmaline-richrocksandin?ux
ofLi,F,andCsintoOrdovicianpsammo-peliticmetasedimentsoccurredintheValde?ores
area(Ca!ceres,Spain).NumerousLi-andSn-bearing...
Relating formulations of the thermodynamics of mineral solid solutions: Activity modeling of pyroxenes, amphiboles, and micas
mineral solid solutions pyroxenes amphiboles andmicas
2012/3/30
Inathermodynamicdescriptionofamineralsolidsolution,itiscustomarytoselecta
minimalgroupofend-membersthatconstitutesanindependentset,andyetinpractical
calculationsitcommonlyoccursthatadifferentindepen...
Octahedral versus tetrahedral coordination of Al in synthetic micas determined by XANES
Octahedral versus tetrahedral coordination Al synthetic micas determined XANES
2012/4/5
WeusedtheJUMBOmonochromatoratSSRLtomeasuretheAl K-edgeX-rayab-
sorptionspectraofsyntheticmicashavingvariableAlcontentandoccupancy,from0to
2 intheoctahedralMpositions,and0to inthetetrahedralTposition...
The Cryptand [222] for Exchanging Cations of Micas
Biotite Cryptand Exchange Lithium Mica Muscovite Phlogopite Potassium Rubidium Strontium
2011/12/28
Cation exchange experiments were carried out on phlogopite, biotite, and muscovite using cryptand [222] as a complexing agent, dioxane as solvent, and Li as the exchanging cation. The results indicate...
The Diagenetic to Low-Grade Metamorphic Evolution of Matrix White Micas in the System Muscovite-Paragonite in a Mudrock from Central Wales, United Kingdom
Central Welsh basin Diagenesis Intermediate Na/K mica Low-grade metamorphism Modulated structure Muscovite Paragonite Solvus
2011/12/29
Two orientations of white micas with subordinate chlorite have been observed in a fine-grained (50 Å to 2 µm) matrix of a Silurian lower anchizonal mudrock from central Wales: one parallel...
The Near-Infrared Combination Band Frequencies of Dioctahedral Smectites, Micas, and Illites
Al content Dioctahedral smectites Micas NIR spectra
2011/12/30
The highest frequency near-infrared (NIR) combination bands for specimens of four species of mica—montmorillonite-beidellite, illite, chlorite, and kaolinite—were correlated with respect to Al2O3 cont...
Quantitative Analysis of Mixtures of 1M and 2M1 Dioctahedral Micas by X-Ray Diffraction
March function Peak-area ratio Preferred orientation Quantitative analysis X-ray diffraction 1M mica 2M1 mica
2011/12/1
Abstract: Investigation of a naturally occurring mixture of dioctahedral micas prompted an examination of X-ray diffraction (XRD) techniques for obtaining quantitative estimates of 1M and 2M1 mica pro...
Assignment of the Far-Infrared Absorption Bands of K in Micas
Dichroism Far-infrared spectroscopy Mica Potassium Vermiculite
2011/12/31
To identify the far-infrared (FIR) absorption bands related to K cations in micas, spectra of muscovite, phlogopite, and biotite were compared with the spectra of pyrophyllite and talc, which have no ...
Far-Infrared Study of Potassium in Micas
Biotite Dehydroxylation Far-infrared spectroscopy Muscovite Phlogopite Potassium
2012/1/4
The characterization of cations associated with clay materials has generally been approached by the sequential use of specific chemical reagents. To avoid the disturbing effect of the chemical reagent...
Polytypism of Micas. III. X-Ray Diffraction Identification
Crystal structure Mica Order-disorder Polytype Single crystal X-ray diffraction X-ray powder diffraction
2011/11/25
Abstract: Classification and identification criteria of maximum-degree-of-order (MDO) polytypes of homo- and meso-octahedral micas based on the distribution of the intensities of 20l (13l) and 02l ref...
Polytypism of Micas. II. Classification and Abundance of MDO Polytypes
Classification Homomorphy Maximum degree of order Mica Order-disorder Polytype
2012/2/6
The maximum-degree-of-order (MDO) polytypes in all three mica families have been classified into two subfamilies and five homomorphous MDO groups according to their superposition structure and the YZ ...
Polytypism of Micas. I. MDO Polytypes and Their Derivation
Maximum degree of order Mica Order-disorder Polytype
2012/2/6
A procedure leading to the systematic derivation of all maximum-degree-of-order (MDO) polytypes in the three mica families, based on the order-disorder (OD) interpretation of mica structures, has been...
Review of Cation Ordering in Micas
Cation ordering Lepidolite Margarite Mica Muscovite Paragonite Phengite
2012/2/2
Long-range ordering of tetrahedral cations in micas is favored by phengitic compositions, by the 3T stacking sequence of layers, and by tetrahedral Si:Al ratios near 1:1. Phengites of the 1M, 2M1, and...
Factors Affecting Orientation of OH-Vectors in Micas
Celadonite Electrostatic calculations Glauconite Hydroxyl vectors Mica Muscovite Phengite
2012/2/8
The orientation of the OH-vectors in hydroxyl groups of micas of different compositions, polytype modifications, and symmetry were calculated by the method of minimization of electrostatic energy. The...