The stable phase in the core is hcp

• Spin polarised calculations on all phases at core P reveal reduced _ for bcc/bct and zero _ for other phases _ no magnetism.

• bcc and bct transform to fcc, orthorhombic to hcp; hcp, fcc, and dhcp remain mechanically stable at core pressures.

• However, fcc and dhcp are less favourable energetically; therefore hcp is the stable phase in the core.

(harmonically at this point!)

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