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The Crystal Structure of the Dioctahedral Mica 2M2 Determined by High Voltage Electron Diffraction
Crystal Structure Dioctahedral Mica Electron Diffraction
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2012/2/15
The structure of a dioctahedral 2M2 mica was defined by high voltage electron diffraction. The cell parameters are: a = 8·965, b = 5·175, c = 20·31 ∈, モ = 100∑ 40∏, Z = 4, space group C2/c. Despite th...
The Experimental Transformation of Mica toward Smectite*; Relative Importance of Total Charge and Tetrahedral Substitution
Experimental Transformation Mica Smectite Relative Importance
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2012/2/15
This article emphasizes the influence of crystal-chemical composition on the ease of transformation of micas to vermiculite or more smectite-like minerals. The swelling test, with glycerol, of Mg-satu...
Formation of an Interstratified Mineral by Extraction of Potassium from Mica with Sodium Tetraphenylboron
Interstratified Mineral Potassium Mica Sodium Tetraphenylboron Extraction
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2012/2/17
Interlayer K was extracted with sodium tetraphenylboron solution from a powdered sericite heated to the temperature of dehydroxylation and quenched to room temperature. By this procedure, sericite of ...
Extinction Bend Contours in Electron Microscopy of Clay-Size Mica-Vermiculites
Extinction Bend Contours Electron Microscopy Clay-Size Mica-Vermiculites
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2012/2/17
Extinction bend contours, observed in Cs-treated mica-vermiculites by transmission electron microscopy, give information on the morphology and crystal orientation and continuity in individual particle...
Selectivity Effect of Cesium on Clay Size Weathered Mica; Transmission Electron Microscopy Studies
Selectivity Effect Cesium Clay Size Mica Transmission Electron Microscopy Studies
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2012/2/17
The use of electron diffraction contrast to detect local concentrations of interlayer cations in mica-vermiculites was examined. Cs and Mg, because of their contrasting atomic scattering amplitudes fo...
Dodecylammonium-Mica Complexes-II Characterization of the Reaction Products
Dodecylammonium Mica Complexes Characterization the Reaction Products
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2012/2/17
Interlayer potassium was removed from a wide range of mice minerals by treatment with dilute solutions of n-dodecylammonium chloride. On subsequent reaction with the appropriate metal methoxide, the N...
I.R. Studies of Some Interstratified Minerals of Mica and Montmorillonite
I.R. Interstratified Minerals Mica Montmorillonite
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2011/11/17
Abstract: I.R. band shifts in the 830, 750 and 530 cm−1 regions that occur in interstratified layer silicates on heating were used to characterize the nature of the component layers. Two specime...
Dodecylammonium-Mica Complexes桰 Factors Affecting the Exchange Reaction
Dodecylammonium Mica Complexes Exchange Reaction
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2012/2/20
Dodecylammonium chloride (DAC) is used as a reagent to displace potassium from a wide range of mica minerals. Displacement is rapid and essentially complete for trioctahedral micas even in dilute solu...
Mica Weathering Rates as Related to Mica Type and Composition
Mica Weathering Rates Mica Type Composition
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2012/2/20
Potassium release rates from micas varying widely in type and composition were measured. A sodium tetraphenylboron solution was used as the extracting agent. Muscovites were found to be two orders of ...
Differential Release of Potassium from Interstratified Mica Clay Minerals as Related to Probable Differences in Their Mica Layer Components
Differential Release Potassium Interstratified Mica Clay Minerals Mica Layer Components
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2012/2/20
Release of potassium by extraction with solutions containing sodium tetraphenyl boron or by leaching with 0·1 N barium chloride seemed to be related to the nature of the mica layers in the interstrati...
A Purple-Colored 1M Mica Clay from Silverton, Colorado
Purple-Colored 1M Mica Clay Silverton
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2012/2/21
A purple-colored clay of 1M mica polymorph in association with lead-zinc ore was collected from an abandoned mine dump near Silverton, Colorado. Electron micrographs show that the crystallites of the ...
Fourier Transform Analysis: (1) X-ray Diffraction Effects by Finite Montmorillonite and Mica Crystals
X-ray Diffraction Effects Fourier Transform Analysis Montmorillonite Mica Crystals
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2011/11/16
A computer program has been developed to generate the X-ray diffraction intensity distribution along any particular reciprocal lattice row, plane, or volume, for any arbitrary group of atoms within a ...
Visible Changes in Macro Mica Particles that Occur with Potassium Depletion
Macro Mica Particles Potassium Depletion
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2011/11/17
Mica particles approximately 10 or 25 mm square and 0.5 mm thick were placed in NaCl-NaTPB solutions to make visual observations of the changes that occur in micas when the interlayer K is replaced by...