A layer stacking with large repeating unit in multi-modal cage-type anionic-surfactant-templated silica mesoporous crystal

Yasuhiro Sakamoto, Osamu Terasaki

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Cage-type anionic-surfactant-templated silica mesoporous crystals display rich structural diversity. Among them, cage-type mesoporous crystals with tetrahedrally close-packed (tcp) structures can be described by four types of polyhedron, 512, 51262, 5126 3 and 51264. We have found new stacking sequences as a minor phase coexisting with an Fd3m structure, and have characterized their structures using transmission electron microscopy (TEM). The new stacking sequences can be explained by the stacking of three kinds of layer based on a description of the polyhedra. Two of the layers consist of two kinds of polyhedron, 512 and 51264, and these two layers are also the constituents of the Fd3m structure. The other layer consists of two different kinds of polyhedron, 51262 and 5 1263, corresponding to layer z, which were introduced in our recently published papers [e.g. Y. Sakamoto, et al., Chem. Mater. 21 (2009) 223]. We have observed that one of the new stacking sequences, with a large repeating unit, contains these three layers and bears a close resemblance to one of the Frank-Kasper phases with rhombohedral symmetry, known as μ-phase.

Original languageEnglish
Pages (from-to)762-767
Number of pages6
JournalSolid State Sciences
Volume13
Issue number4
DOIs
Publication statusPublished - 2011 Apr

Keywords

  • Electron microscopy
  • Multi-modal cage-type structure
  • Polyhedron
  • Silica mesoporous crystal
  • Tetrahedrally close-packed structure

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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