Considerations on the color and hopper crystal of bismuth

Ryunosuke Fukui; Keita Kurobane; Shunsuke Sasaki; Taisei Omura

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Cancelled

[J] Poster

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[O-04] Poster presentations by senior high school students

convener:Tatsuhiko Hara(International Institute of Seismology and Earthquake Engineering, Building Research Institute), Katsuyoshi Michibayashi(Department of Earth and Planetary Sciences, Nagoya University), Miwa Kuri(Japan Meteorological Agency), Keiko Konya(Japan Agency for Marine-Earth Science and Technology)

[O04-P37] Considerations on the color and hopper crystal of bismuth

*Ryunosuke Fukui¹, *Keita Kurobane¹, *Shunsuke Sasaki¹, *Taisei Omura¹ (1.Hongo senior high school)

Keywords:Bismuth, Hopper crystal

When an element is cooled after heating fusion, bismuth of atomic number 83 is a metallic mineral of the characteristic crystal structure called hopper crystal and the fascination with which the various structural color is made. Hopper crystal is the case that a part in the corner where a face touches the side of the crystal grows suddenly, and the facial region part is the crystal which dented. We could learn by trial and error and make now the crystal with some beautiful levels to exhibit and create at the school festival. To make more good crystals, we experimented on what happened to hopper crystal by making it low melting point alloy by mixing with the means of the cooling, lead and a tin. Concerning with the oxide skin formed into an outside was checked about the structural color.