Ba2As crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 5-coordinate geometry to five equivalent As(1) atoms. In the second Ba site, Ba(2) is bonded in a distorted square co-planar geometry to four equivalent As(1) atoms. As(1) is bonded in a 9-coordinate geometry to four equivalent Ba(2) and five equivalent Ba(1) atoms.
Ba2As crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 5-coordinate geometry to five equivalent As(1) atoms. There is one shorter (3.32 Å) and four longer (3.73 Å) Ba(1)-As(1) bond lengths. In the second Ba site, Ba(2) is bonded in a distorted square co-planar geometry to four equivalent As(1) atoms. All Ba(2)-As(1) bond lengths are 3.50 Å. As(1) is bonded in a 9-coordinate geometry to four equivalent Ba(2) and five equivalent Ba(1) atoms.