Structure defects in kaolinite
Abstract
In order to study the nature and extent of structural disorders in kaolinite, a sample from Singhbhum, India, has been subjected to x-ray diffraction and electron-microscope examination. Electron-microscope studies revealed the distribution of particle sizes. X-ray diffraction line profiles of different reflections were corrected for geometrical factors by the Stokes deconvolution method. Line broadening and Fourier analysis methods revealed that the particles were flaky with less extension in the c direction than in the a and b directions. The average particle has been shown to have a length and breadth of 700 Å and a thickness of 219 Å.
Expressions for apparent particle size and particle-size line profile for triclinic crystals with parallelepiped form have been worked out. With the help of these expressions, the pure diffraction line profiles were corrected for particle-size effects and pure-defect line profiles were obtained. Fourier analysis of these line profiles showed that the probability of a layer shift by an amount ⅓ b or ⅔ b occuring was .046.
From the integral width and peak shift in the pure-defect line profiles of 00l reflections, the fractional extent and probability of interlayer variation has been found to be .126 and .057 respectively. A possible interpretation of interlayer-distance change in metakaolin has been put forward on the basis of these data.
Articles in the same Issue
- Structure defects in kaolinite
- Dehydration of goethite and diaspore*
- Contributions to the crystal chemistry of normal and defect tetrahedral structures*
- The crystal and molecular structure of a synthetic imidazo-purine
- The crystal structure of the anhydrous cadmium and mercuric sulfates
- The crystal structure of dimethyl sulfone
- Hydrogen bonding and conformations in echitamine salts
- Ein einfacher Heizaufsatz für die Präzessionskamera
- Röntgenaufnahmen mit der Buergerschen Präzessionskamera bei Temperaturen zwischen 1000°C und 2000°C
- Die Kristallstruktur des Phenols
- Crystal structure of bis-(hydrazine)manganese(II) chloride
- On the crystal structure of biotites
- A three-dimensional refinement of crystalline structure of trioxane*
- Über die Orientierung des durch Erhitzen aus Manganit entstehenden Pyrolusits
Articles in the same Issue
- Structure defects in kaolinite
- Dehydration of goethite and diaspore*
- Contributions to the crystal chemistry of normal and defect tetrahedral structures*
- The crystal and molecular structure of a synthetic imidazo-purine
- The crystal structure of the anhydrous cadmium and mercuric sulfates
- The crystal structure of dimethyl sulfone
- Hydrogen bonding and conformations in echitamine salts
- Ein einfacher Heizaufsatz für die Präzessionskamera
- Röntgenaufnahmen mit der Buergerschen Präzessionskamera bei Temperaturen zwischen 1000°C und 2000°C
- Die Kristallstruktur des Phenols
- Crystal structure of bis-(hydrazine)manganese(II) chloride
- On the crystal structure of biotites
- A three-dimensional refinement of crystalline structure of trioxane*
- Über die Orientierung des durch Erhitzen aus Manganit entstehenden Pyrolusits
