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Perturbative Theory of Mica Polytypism. Role of the M2 Layer in the Formation of Inhomogeneous Polytypes
Crystal Growth Long-Period Polytypes Mica Polytypism
2011/12/2
Abstract: A new model is proposed to explain, within the framework of the theory of spiral growth of Frank, the formation on inhomogeneous mica polytypes. This model relates the interaction and cooper...
HRTEM and SAED investigations of polytypism, stacking disorder, crystal growth, and vacancies in chlorites from subgreenschist facies outcrops
Selected-area electron diffraction high-resolutio transmission electron microscopy
2012/3/30
Selected-areaelectrondiffraction(SAED)combinedwithexperimentalandcomputed
high-resolutiontransmissionelectronmicroscopy(HRTEM)imageswereusedtoinvesti-
gatepolytypism,stackingdisorder,mixedlayering,a...
Oriented attachment and growth, twinning, polytypism, and formation of metastable phases: Insights from nanocrystalline TiO2
Oriented attachment growth twinning polytypism formation of metastable phases Insights nanocrystalline TiO2
2012/4/1
Atomic-resolution transmission electron micrographs show that nanocrystalline TiO2 coarsens by oriented attachment and growth under hydrothermal conditions. In addition to forming homogeneous single c...
Examination of X-ray diffraction intensities for FeO collected in situ at high pressure and high temperature reveals that the atomic arrangements of FeO in the hexagonal struc-ture are not the same as...
Stacking disorder and polytypism in enargite and luzonite
Stacking disorder polytypism enargite luzonite
2012/3/31
Microstructures of enargite and luzonite (Cu3AsS4) were studied using high-resolution transmission electron microscopy (HRTEM) and selected-area electron diffraction (SAED). Enargite and luzonite are ...
TEM Observations of Coherent Stacking Relations in Smectite, I/S and Illite of Shales: Evidence for MacEwan Crystallites and Dominance of 2M1 Polytypism
2M1 Polytypism Coherent Fundamental Particles Illite I/S MacEwan Crystallites Optical Diffraction Patterns SAED Smectite Stacking Relations Cross Fringes
2011/12/23
Abstract: TEM characterization of stacking relations in I/S of expanded shale samples from the Gulf Coast and Michigan Basin was carried out to address the issues of the degree of coherency and the na...
Transmission Electron Microscope Observations of Illite Polytypism
Illite Polytypism Transmission electron microscopy
2012/1/4
Transmission electron microscopy (TEM), including selected area electron diffraction (SAED), has been used to identify polytypes in illite, phengite and muscovite from samples representing a wide rang...
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...
Polytypism of Micas: OD-Interpretation, Stacking Symbols, Symmetry Relations
Mica Order-disorder Polytypism Stacking symbol Symmetry
2012/2/7
From the symmetry point of view, micas may be classified as follows: those with all three octahedrally coordinated sites occupied by the same cation (homo-octahedral micas), those with only two of the...
Four chlorite polytypes of Bailey and Brown (1962) have been identified by X-ray diffraction in clay-size chlorites of soils, sediments, and sedimentary rocks: (1) IIb, the polytype of common metamorp...