Elasticity of single-crystal NAL phase at high pressure : A potential source of the seismic anisotropy in the lower mantle

Abstract

The new hexagonal aluminous phase, named the NAL phase, is expected to be stable at depths of<1200 km in subducted slabs and believed to constitute 10~30wt% of subducted mid-ocean ridge basalt together with the CaFe2O4-type aluminous phase. Here elasticity of the single-crystal NAL phase is investigated using Brillouin light scattering coupled with diamond… (More)

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