Materials Data on MgC2 by Materials Project
MgC2 crystallizes in the tetragonal P4_2/mnm space group. The structure is three-dimensional. Mg2+ is bonded in a distorted linear geometry to six equivalent C1- atoms. There are two shorter (2.17 Å) and four longer (2.57 Å) Mg–C bond lengths. C1- is bonded in a 2-coordinate geometry to three equivalent Mg2+ and one C1- atom. The C–C bond length is 1.26 Å.
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