MgF2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. Mg(1) is bonded in a 7-coordinate geometry to three equivalent F(2) and four equivalent F(1) atoms. There are two inequivalent F sites. In the first F site, F(2) is bonded in a trigonal non-coplanar geometry to three equivalent Mg(1) atoms. In the second F site, F(1) is bonded to four equivalent Mg(1) atoms to form a mixture of corner and edge-sharing FMg4 tetrahedra.
MgF2 is Cotunnite structured and crystallizes in the orthorhombic Pnma space group. Mg(1) is bonded in a 7-coordinate geometry to three equivalent F(2) and four equivalent F(1) atoms. There is one shorter (2.02 Å) and two longer (2.10 Å) Mg(1)-F(2) bond lengths. There are a spread of Mg(1)-F(1) bond distances ranging from 2.05-2.23 Å. There are two inequivalent F sites. In the first F site, F(2) is bonded in a trigonal non-coplanar geometry to three equivalent Mg(1) atoms. In the second F site, F(1) is bonded to four equivalent Mg(1) atoms to form a mixture of corner and edge-sharing FMg4 tetrahedra.