Cubic MgSiO3 Perovskite
Phonons at Zero Wave Vector
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Structure and normal modes read from converted ABINIT output.
www.abinit.org
Calculated with norm-conserving LDA pseudopotentials.
Three imaginary frequencies indicate dynamical instability. This is hardly suprising, since magnesium silicate perovskite has an orthorhombic unit cell (Pbnm), rather than the cubic (Pm-3m) structure shown here.
Reference: Schauble, unpub.
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