Development of a reactive force field for iron-oxyhydroxide systems.
We adopt a classical force field methodology, ReaxFF, which is able to reproduce chemical reactions, and train its parameters for the thermodynamics of iron oxides as well as energetics of a few iron redox reactions. Two parametrizations are developed, and their results are compared with quantum calculations or experimental measurements. In addition to training, two test cases are considered: the lattice parameters of a selected set of iron minerals, and the molecular dynamics simulation of a model for alpha-FeOOH (goethite)-water interaction. Reliability and limitations of the developed force fields in predicting structure and energetics are discussed.
Aryanpour
Masoud
M
Department of Mechanical Engineering, Stanford University, Stanford, California 94305, USA. masoud@stanfordalumni.org
van Duin
Adri C T
AC
Kubicki
James D
JD