Characterization of ancient red iron oxides excavated from the shimo-ohgibaru archaeological site in Kumamoto, Japan

Hiromi Tsuji, Ryu Murakami, Takashi Miyazaki, Hideki Hashimoto, Teruaki Danno, Yoshihiro Kusano, Takahiro Kikuchi, Makoto Nakanishi, Tatsuo Fujii, Jun Takada

Research output: Contribution to journalArticle

1 Citation (Scopus)


To clarify the detailed features of the red bengala samples excavated from the Shimo-ohgibaru archaeological site in the late Yayoi period (2nd to 3rd century A.D.) from the viewpoint of materials science, colorimetric measurements, X-ray fluorescence analyses, X-ray diffraction measurements, transmission electron microscope observations, and surface area measurements of the ancient bengala samples were achieved. The ancient bengala sample was found to be high purity α-Fe2O3. The features of the color tone and particle size of the ancient bengala were clarified by comparing with those of commercially available bengala, Fukiya bengala, and synthesized α-Fe2O3. In addition, the starting materials and synthesis processes of the ancient bengala were discussed by applying the élutriation experiments of representative natural hematite and heat-treated natural iron hydroxide (Oniita).

Original languageEnglish
Pages (from-to)146-153
Number of pages8
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Issue number4
Publication statusPublished - Apr 2013



  • α-FeO color tone
  • Ancient bengala
  • Élutriation
  • Particle size

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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