STACKING DISORDER IN KAOLINITE REVEALED BY HRTEM: A REVIEW

• KOGURE TOSHIHIRO

  Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo

抄録

Although stacking disorder in kaolinite was extensively investigated for a long time, its real structure has not been understood sufficiently. Recently high-resolution transmission electron microscopy (HRTEM) studies of kaolinite were reported with sufficient resolution to determine the origin of the stacking disorder directly. Most common stacking faults in kaolinite are disorder of the alternative layer displacement, t_1 (approximately -a/3) and t_2 (a/6-b/6), between adjacent layers. The two layer displacements are related to each other by the pseudo-mirror plane passing the octahedral vacant site in the kaolinite unit layer. Furthermore, this type of disorder can occur as (1) isolated stacking faults (for instance, insertion of t_2 in the ordered matrix with t_1) as well as (2) interstratifications of packets in which the layer displacement is ordered. These two occurrence modes of the t_1/t_2 disorder probably reflect the growth process of kaolinite. Disorder by displacement of the octahedral vacancy sites in the dioctahedral 1:1 layer and/or layer rotation, is another stacking disorder found in kaolinite of sedimentary origin.

収録刊行物

• Ｃｌａｙ　Ｓｃｉｅｎｃｅ

  Ｃｌａｙ　Ｓｃｉｅｎｃｅ 15 (1), 3-11, 2011

  一般社団法人 日本粘土学会

キーワード

• kaolinite
• stacking disorder
• high-resolution transmission electron microscopy
• layer displacement
• polytypes

詳細情報

• CRID: 1390282679088453120
• NII論文ID: 110008661167
• NII書誌ID: AA00607148
• DOI: 10.11362/jcssjclayscience.15.1_3
• ISSN: 21863555
• ISSN: 00098574
• 本文言語コード: en
• データソース種別:
  • JaLC
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可