| 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 |
|
|---|
| 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 *help |
¥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.
|
