Materials Data on Ba(GaAs)2 by Materials Project
Ba(GaAs)2 crystallizes in the monoclinic P2_1/c space group. The structure is three-dimensional. Ba2+ is bonded to six As3- atoms to form distorted edge-sharing BaAs6 pentagonal pyramids. There are a spread of Ba–As bond distances ranging from 3.31–3.47 Å. There are two inequivalent Ga2+ sites. In the first Ga2+ site, Ga2+ is bonded in a trigonal non-coplanar geometry to three As3- atoms. There are a spread of Ga–As bond distances ranging from 2.54–2.60 Å. In the second Ga2+ site, Ga2+ is bonded in a trigonal non-coplanar geometry to three As3- atoms. There are a spread of Ga–As bond distances ranging from 2.54–2.59 Å. There are two inequivalent As3- sites. In the first As3- site, As3- is bonded to three equivalent Ba2+ and three Ga2+ atoms to form a mixture of distorted edge and corner-sharing AsBa3Ga3 octahedra. The corner-sharing octahedra tilt angles range from 24–101°. In the second As3- site, As3- is bonded to three equivalent Ba2+ and three Ga2+ atoms to form a mixture of distorted edge and corner-sharing AsBa3Ga3 octahedra. The corner-sharing octahedra tilt angles range from 26–101°.