Materials Data on MgCl2 by Materials Project
MgCl2 is trigonal omega-like structured and crystallizes in the trigonal R-3m space group. The structure is two-dimensional and consists of three MgCl2 sheets oriented in the (0, 0, 1) direction. Mg2+ is bonded to six equivalent Cl1- atoms to form edge-sharing MgCl6 octahedra. All Mg–Cl bond lengths are 2.53 Å. Cl1- is bonded in a distorted T-shaped geometry to three equivalent Mg2+ atoms.