Construction of Structure Models of Iron Hydroxide Nanominerals Using Scanning Transmission Electron Microscopy (STEM)

• Project/Area Number: 26400512
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Petrology/Mineralogy/Economic geology
• Research Institution: Niigata University
• Principal Investigator: KONISHI HIROMI 新潟大学, 自然科学系, 教授 (30705215)
• Co-Investigator(Kenkyū-buntansha): 赤井 純治 新潟大学, 自然科学系, フェロー (30101059)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2014: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
• Keywords: STEM / ferrihydrite / schwertmannite / 走査透過電子顕微鏡 / フェリハイドライト / シュベルトマナイト / Siliceous ferrihydrite / Siliceous magnetite / 鉄還元バクテリア / 鉄水酸化物 / ラマン分光法

Outline of Final Research Achievements

We attempted to construct structure models of ferrihydrite and schwertmannite based on the Z-contrast images obtained by scanning transmission electron microscopy. Particles identified as 6-line ferrihydrite by electron diffraction and X-ray diffraction have ABAC, AB, and irregular stacking sequences. Unlike the models previously proposed, Fe occupies octahedral holes, but little or no Fe occupies the tetrahedral holes. Schwertmannite has been thought to have a structure similar to akageneite, but in the Z-contrast images, tunnels made of Fe octahedrons like those in akageneite were not observed.

Research Products

• [Int'l Joint Research] University of Wisconsin-Madison(米国)
• [Journal Article] Occurrences and distribution of "invisible" precious metals in sulfide deposits from the Edmond hydrothermal field, Central Indian Ridge (2016)
  • Author(s): Wu, ZW, Sun, XM, Xu, HF, Konishi, H, Wang, Y, Wang, C, Dai, YZ, Deng, XG, Yu, M
  • Journal Title: ORE GEOLOGY REVIEWS Volume: 79 Pages: 105-132
  • DOI: 10.1016/j.oregeorev.2016.05.006
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Role of nano-goethite in controlling U(VI) sorption-desorption in subsurface soil (2016)
  • Author(s): Jung, HB, Xu, HF, Konishi, H, Roden, EE]
  • Journal Title: JOURNAL OF GEOCHEMICAL EXPLORATION Volume: 169 Pages: 80-88
  • DOI: 10.1016/j.gexplo.2016.07.014
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Interstratification of graphene-like carbon layers within black talc from Southeastern China: Implications to sedimentary talc formation (2016)
  • Author(s): Li, CM, Wang, RC, Xu, HF, Lu, XC, Konishi, H, He, K
  • Journal Title: AMERICAN MINERALOGIST Volume: 101 Issue: 7 Pages: 1668-1678
  • DOI: 10.2138/am-2016-5600
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Interactions Between Fe(III)-Oxides and Fe(III)-Phyllosilicates During Microbial Reduction 1: Synthetic Sediments (2016)
  • Author(s): Wu, T, Kukkadapu, RK, Griffin, AM, Gorski, CA, Konishi, H, Xu, HF, Roden, EE
  • Journal Title: GEOMICROBIOLOGY JOURNAL Volume: 33 Issue: 9 Pages: 793-806
  • DOI: 10.1080/01490451.2015.1117546
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 鉄還元細菌によるヒ酸・亜ヒ酸吸着フェリハイドライトの変化とヒ素の挙動 (2016)
  • Author(s): 眞鍋達郎、小西博巳
  • Organizer: 日本鉱物科学会
  • Place of Presentation: 金沢市、金沢大学
  • Year and Date: 2016-09-23
• [Presentation] Fate of As(V) and As(III) during Bacterial Iron Reduction of Ferrihydrite (2016)
  • Author(s): Manabe, T., Konishi, H.
  • Organizer: Goldschmidt2016
  • Place of Presentation: Yokohama
  • Year and Date: 2016-06-26
  • Int'l Joint Research
• [Presentation] Fate of As(V) and As(III) during Bacterial Iron Reduction of Ferrihydrite (2016)
  • Author(s): Manabe T & Konishi H
  • Organizer: Goldschmidt 2016
  • Place of Presentation: パシフィコ横浜（神奈川県・横浜）
  • Year and Date: 2016-06-26
  • Int'l Joint Research
• [Presentation] 鉄還元細菌によるAs，Zn 吸着フェリハイドライトの変化 (2015)
  • Author(s): 眞鍋達郎・小西博巳
  • Organizer: 日本鉱物科学会
  • Place of Presentation: 東京大学（東京）
  • Year and Date: 2015-09-25
• [Presentation] 鉄還元細菌の活動によりSi ferrihydriteから変化したSiを含む磁鉄鉱と鉄に富む層状ケイ酸塩鉱物 (2015)
  • Author(s): 小西博巳・眞鍋達郎
  • Organizer: 日本鉱物科学会
  • Place of Presentation: 東京大学（東京）
  • Year and Date: 2015-09-25
• [Presentation] Reduction of As- and Zn-Loaded Ferrihydrite by Iron-Reducing Bacteria (2015)
  • Author(s): Manabe T & Konishi H
  • Organizer: Goldschmidt 2015
  • Place of Presentation: Prague, CZ
  • Year and Date: 2015-08-16
  • Int'l Joint Research
• [Presentation] Iron-Rich Clays and Si-Bearing Magnetite Produced by Iron-Reducing Bacteria (2015)
  • Author(s): Konishi H & Manabe T
  • Organizer: Goldschmidt 2015
  • Place of Presentation: Prague, CZ
  • Year and Date: 2015-08-16
  • Int'l Joint Research