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

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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: BIOMINERALIZATION; FIB; GLAZE; JAPAN; LICHEN-ROCK INTERACTION; PSEUDOBROOKITE; ROOF TILE; TEM

Document Type: Research Article

DOI: http://dx.doi.org/10.1180/claymin.2009.044.2.177

Publication date: June 1, 2009

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