JpGU-AGU Joint Meeting 2020

Presentation information

Cancelled

[J] Poster

O (Public ) » Public

[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-P04] Relationship between mineral crystallization and impurities.

*Hirokazu Kimijima1, *Kenta Usami1, *Hiroyuki Sueno1, *Ryo Nakane1, Hidenori Takemura1 (1.Johoku Middle and high school)

Keywords:mineral, impurities, crystallization

Crystals formed by crystallization like from hot water has various sizes. The presence of impurities can be considered as a factor for changing these. However, it is not known how impurities affect to the crystallized minerals size.

In this study, we investigated how CaCl, which was considered as an impurity when NH4H2PO4 crystallized, affected the crystallization.

The survey items were four points: “The crystals size”, “The approximate number of the generated crystals”, “microscopic image of the crystals”, and “The crystals growth process”.

Through this research, it was found that when impurities increase, crystals become smaller,and the surface and internal flaws increased.

Using this research, we also succeeded in creating some interiors.