High-resolution electron microscopy of microstructure of MnF2 subjected to shock compression at 4.4 GPa

Microstructure of MnF2 subjected to by shock compression at 4.4 GPa was examined using transmission electron microscopy (TEM). Lamellar structure consisting of twin-related domains of rutile-structure and intergrowth of α- PbO2-type phase is observed in the electron diffraction pattern and TEM images. The crystallographic relationship between rutile and α- PbO2-type phases can be expressed as (1̄01)rutile∥(001)α-PbO2 and [111]rutile∥[110]α-PbO2.