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Nanoscale pseudobrookite layer in the surface glaze of a Japanese sekishu roof tile

Published online by Cambridge University Press:  09 July 2018

K. Watanabe ,
H. Ohfuji ,
R. Kitagawa  and
Y. Matsui
K. Watanabe*
Affiliation:
Advanced Electron Microscopy Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima, 739-8526, Japan
H. Ohfuji
Affiliation:
Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, 790-8577, Japan
R. Kitagawa
Affiliation:
Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-hiroshima, 739-8526, Japan
Y. Matsui
Affiliation:
Advanced Electron Microscopy Group, National Institute for Materials Science, 1-1 Namiki, Tsukuba, 305-0044, Japan
*
*E-mail: watanabe.katsuaki@nims.go.jp
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Abstract

The mineralogy of the glazed surfaces of Japanese sekishu roof tiles covered by a crustose lichen – Lecidella asema (Nyl.) Knoph & Hertel – was investigated using transmission electron microscopy (TEM). The study sought to identify the Ti-Fe mineral observed as a low concentration of Ti and Fe in a previous study of the glazed surfaces of the same roof tile. The TEM analysis revealed that: (1) a thin layer of the Ti-Fe mineral pseudobrookite exists on the glaze surface; (2) the pseudobrookite consists of well-ordered single crystals, continuously and widely distributed on the glaze surface.

Keywords

TEMFIBroof tileglazebiomineralizationlichen-rock interactionpseudobrookiteJapan
Type
Research Article
Information
Clay Minerals , Volume 44 , Issue 2 , June 2009 , pp. 177 - 180
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2009

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