Materials Data on Mg6AlC by Materials Project

Abstract

Mg6AlC crystallizes in the orthorhombic Amm2 space group. The structure is one-dimensional and consists of two Mg6AlC ribbons oriented in the (0, 0, 1) direction. there are four inequivalent Mg sites. In the first Mg site, Mg is bonded in a single-bond geometry to one C atom. The Mg–C bond length is 2.48 Å. In the second Mg site, Mg is bonded in an L-shaped geometry to two equivalent C atoms. Both Mg–C bond lengths are 2.54 Å. In the third Mg site, Mg is bonded in a 2-coordinate geometry to two equivalent Al atoms. Both Mg–Al bond lengths are 2.83 Å. In the fourth Mg site, Mg is bonded in a distorted water-like geometry to two equivalent Al and two equivalent C atoms. Both Mg–Al bond lengths are 2.92 Å. Both Mg–C bond lengths are 2.26 Å. Al is bonded in a 4-coordinate geometry to four Mg atoms. C is bonded in a 8-coordinate geometry to eight Mg atoms.