|
|
 |
|||||||||||||||||
|
|||||||||||||||||
 |
|||||||||||||||||
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
1 Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
2 Department of Earth Sciences, Faculty of Science, Chiba University, 1-33 Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
Correspondence: * E-mail: kogure{at}eps.s.u-tokyo.ac.jp
Near-atomic resolution TEM imaging has been successfully applied to determine the stacking defect structures in kaolin minerals, especially kaolinite. The specimen studied is from the middle stage of the depth-related kaolinite-to-dickite transformation in a sandstone reservoir. Several high-quality images were recorded on films in which the tetrahedral and octahedral positions in the kaolinite unit layers are clearly resolved, despite the obstacle of electron radiation damage. Electron diffraction and high-resolution imaging of dickite showed that few stacking defects exist in this polytype. On the other hand, kaolinite crystals contain a high density of stacking defects. These defects or stacking disorders are formed by a mixture of two kinds of lateral interlayer shifts, t1 (approximately –a/3) and t2 (–a/3 + b/3), between adjacent layers. Disorder due to the coexistence of B and C layers (dickite-like stacking sequence) was never observed. These results provide not only an unambiguous settlement for the long -standing controversy of the defect structures in kaolinite, but also a new clue to understanding the kaolinite-to-dickite transformation mechanism.
This article has been cited by other articles:
|
|
 |
|
  J. Matusik, A. Gawel, E. Bielanska, W. Osuch, and K. Bahranowski THE EFFECT OF STRUCTURAL ORDER ON NANOTUBES DERIVED FROM KAOLIN-GROUP MINERALS Clays and Clay Minerals, August 1, 2009; 57(4): 452 - 464. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
C. T. Johnston, J. E. Kogel, D. L. Bish, T. Kogure, and H. H. Murray LOW-TEMPERATURE FTIR STUDY OF KAOLIN-GROUP MINERALS Clays and Clay Minerals, August 1, 2008; 56(4): 470 - 485. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. Kameda, K. Saruwatari, D. Beaufort, and T. Kogure Textures and polytypes in vermiform kaolins diagenetically formed in a sandstone reservoir: a FIB-TEM investigation European Journal of Mineralogy, April 1, 2008; 20(2): 199 - 204. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 J. Kameda, R. Miyawaki, R. Kitagawa, and T. Kogure XRD and HRTEM analyses of stacking structures in sudoite, di-trioctahedral chlorite American Mineralogist, October 1, 2007; 92(10): 1586 - 1592. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
E. Balan, E. Fritsch, T. Allard, and G. Calas INHERITANCE VS. NEOFORMATION OF KAOLINITE DURING LATERITIC SOIL FORMATION: A CASE STUDY IN THE MIDDLE AMAZON BASIN Clays and Clay Minerals, June 1, 2007; 55(3): 253 - 259. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Chen and H. Wang Determination of layer stacking microstructures and intralayer transition of illite polytypes by high-resolution transmission electron microscopy (HRTEM) American Mineralogist, May 1, 2007; 92(5-6): 926 - 932. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
S. Guggenheim, J. M. Adams, D. C. Bain, F. Bergaya, M. F. Brigatti, V. A. Drits, M. L. L. Formoso, E. Galan, T. Kogure, and H. Stanjek SUMMARY OF RECOMMENDATIONS OF NOMENCLATURE COMMITTEES RELEVANT TO CLAY MINERALOGY: REPORT OF THE ASSOCIATION INTERNATIONALE POUR L'ETUDE DES ARGILES (AIPEA) NOMENCLATURE COMMITTEE FOR 2006 Clays and Clay Minerals, December 1, 2006; 54(6): 761 - 772. [Full Text] [PDF]
|
|
|
|
 |
|
 S. GUGGENHEIM, J. M. ADAMS, D. C. BAIN, F. BERGAYA, M. F. BRIGATTI, V. A. DRITS, M. L. L. FORMOSO, E. GALAN, T. KOGURE, and H. STANJEK Summary of recommendations of nomenclature committees relevant to clay mineralogy: report of the Association Internationale pour l'Etude des Argiles (AIPEA) Nomenclature Committee for 2006 Clay Minerals, December 1, 2006; 41(4): 863 - 877. [Full Text] [PDF]
|
|
|
|
|
|
T. Kogure, M. Jige, J. Kameda, A. Yamagishi, R. Miyawaki, and R. Kitagawa Stacking structures in pyrophyllite revealed by high-resolution transmission electron microscopy (HRTEM) American Mineralogist, August 1, 2006; 91(8-9): 1293 - 1299. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Kogure, J. Kameda, T. Matsui, and R. Miyawaki Stacking structure in disordered talc: Interpretation of its X-ray diffraction pattern by using pattern simulation and high-resolution transmission electron microscopy American Mineralogist, August 1, 2006; 91(8-9): 1363 - 1370. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
J. Kameda, A. Yamagishi, and T. Kogure Morphological characteristics of ordered kaolinite: Investigation using electron back-scattered diffraction American Mineralogist, August 1, 2005; 90(8-9): 1462 - 1465. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. KOGURE and A. INOUE Stacking defects and long-period polytypes in kaolin minerals from a hydrothermal deposit European Journal of Mineralogy, June 1, 2005; 17(3): 465 - 473. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
T. Kogure, A. Inoue, and D. Beaufort POLYTYPE AND MORPHOLOGY ANALYSES OF KAOLIN MINERALS BY ELECTRON BACK-SCATTERED DIFFRACTION Clays and Clay Minerals, June 1, 2005; 53(3): 201 - 210. [Abstract] [Full Text] [PDF]
|
|
| JOURNAL HOME | HELP | CONTACT PUBLISHER | SUBSCRIBE | ARCHIVE | SEARCH | TABLE OF CONTENTS |
