Modelling the lattice dynamics of the lower mantle, an INS study on CaTiO3
The travel times of seismic waves through the Earth's interior provide one of the only direct constraints of the chemistry and properties of the deep mantle. Calcium perovskite is the third most abundant mineral throughout the lower mantle (~ 700 - 3000 km depth in Earth), but because it is not stable under ambient conditions the speed that sound travels through this phase is almost completely unconstrained. We will perform inelastic neutron scattering measurements on IN8 to measure the acoustic velocities of the titanium end member of calcium perovskite between room temperature and 1500 Celsius, revealing whether its presence in the deep Earth may explain heterogeneous seismic signals that are currently not understood.
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VONESHEN David; IVANOV Alexandre; PIOVANO Andrea and Andrew R Thomson. (2020). Modelling the lattice dynamics of the lower mantle, an INS study on CaTiO3. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.7-01-498
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