2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 19 - Sep 23, 2019Kyushu University Ito Campus
2019 Annual Meeting of Japan Association of Mineralogical Sciences (JAMS)
Sep 19 - Sep 23, 2019Kyushu University Ito Campus
[R2P-09]Synthesis Condition and Iron Valence in Vivianite「発表賞エントリー」
*Kohei Chiba1, Eriko Ohshima2, Misaki Takahashi3, Kazumasa Sugiyama4(1. NIT Ichinoseki Col., Adv. Chem. Eng., 2. NIT Ichinoseki Col., Dept. Eng. Fut. Innov., Div. Chem. Eng. & Bio., 3. NIT Ichinoseki Col., Dept. Chem. Eng., 4. Tohoku Univ., IMR)
Keywords:
Vivianite,Metavivianite,Iron Phosphate
Vivianite is known as an iron (II) phosphate octa hydrate. Metavivianite is known as the oxidized vivianite. They are unearthed together. However, the mechanism of forming metavivianite is unknown. To resolve the thing, we synthesized iron phosphate in virous temperature conditions and analyzed their crystal structures. As a result, we discovered metavivianite obtained in 60 degrees. Above 70 degrees, vivianite and metavivianite are not obtained. It's considered that metavivianite is the metastable phase because it's obtained in a narrow temperature range.