Nanocomposite structure of two-line ferrihydrite powder from total scattering.
Nanocomposite structure of two-line ferrihydrite powder from total scattering.
复制标题
DOI:
10.1038/s42004-020-0269-2
复制
发表时间:
2020-02-21
影响因子:
5.9
通讯作者:
Goodwin, Andrew L.
中科院分区:
文献类型:
--
作者:
Funnell, Nicholas P.;Fulford, Maxwell F.;Inoue, Sayako;Kletetschka, Karel;Michel, F. Marc;Goodwin, Andrew L.
Ferrihydrite is one of the most important iron-containing minerals on Earth. Yet determination of its atomic-scale structure has been frustrated by its intrinsically poor crystallinity. The key difficulty is that physically-different models can appear consistent with the same experimental data. Using X-ray total scattering and a nancomposite reverse Monte Carlo approach, we evaluate the two principal contending models—one a multi-phase system without tetrahedral iron(III), and the other a single phase with tetrahedral iron(III). Our methodology is unique in considering explicitly the complex nanocomposite structure the material adopts: namely, crystalline domains embedded in a poorly-ordered matrix. The multi-phase model requires unphysical structural rearrangements to fit the data, whereas the single-phase model accounts for the data straightforwardly. Hence the latter provides the more accurate description of the short- and intermediate-range order of ferrihydrite. We discuss how this approach might allow experiment-driven (in)validation of complex models for important nanostructured phases beyond ferrihydrite. Although a geologically important mineral, the atomic-scale structure of ferrihydrite remains unresolved. Here the authors combine X-ray total scattering and reverse Monto Carlo to evaluate the two principal contending models, explicitly considering the material’s complex nanocomposite structure.
登录
查看更多内容
影响因子:
1.5
作者:
DRITS, VA;SAKHAROV, BA;MANCEAU, A
通讯作者:
MANCEAU, A
影响因子:
3
作者:
Chasteen, ND;Harrison, PM
通讯作者:
Harrison, PM
影响因子:
15
作者:
Hudait, Arpa;Molinero, Valeria
通讯作者:
Molinero, Valeria
影响因子:
2.2
作者:
EGGLETON, RA;FITZPATRICK, RW
通讯作者:
FITZPATRICK, RW
DOI:
10.1107/s0108768190011041
发表时间:
1991-04-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE
影响因子:
--
作者:
BRESE, NE;OKEEFFE, M
通讯作者:
OKEEFFE, M