Before revision: Forms at very high pressure.δ-SnP63/mmchP2MgForms above 157 GPa.StanenePoloniumα-Poloniumsimple cubicβ-Poloniumrhombohedral Most stable stable under standard conditions.
After revision: Forms at very high pressure.δ-SnP63/mmchP2MgForms above 157 GPa.StanenePoloniumα-Poloniumsimple cubicβ-Poloniumrhombohedral Most structure stable under standard conditions.