11-13 November 2020
Online Event
Australia/Sydney timezone

Atomistic modelling as a complementary tool for diffraction studies

12 Nov 2020, 10:45
20m
Online Event

Online Event

Oral Chemistry & Crystallography Chemistry & Crystallography

Speaker

Max Avdeev (Australian Nuclear Science and Technology Organisation, Australian Centre for Neutron Scattering)

Description

Diffraction experiments typically provide clear picture of a crystal structure and basis for understanding material properties. However, for materials with high static or dynamic disorder and/or weakly occupied atomic sites, the diffraction data reflecting space- and time-averaged state may struggle to distinguish several alternative models yielding similar $\chi$2. In that case, atomistic modelling may help not only to identify the more energetically stable configuration but also provide insights into the mechanism of its formation. I will present several recent examples of studies of disordered oxygen and proton ionic conductors, where empirical and ab initio static and geometry optimisation calculations and molecular dynamics simulations not only helped to validate neutron diffraction analysis but also revealed the mechanism driving the disorder.

Speakers Gender Male
Level of Expertise Expert
Do you wish to take part in the poster slam No

Primary author

Max Avdeev (Australian Nuclear Science and Technology Organisation, Australian Centre for Neutron Scattering)

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